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warrant; protect against loss; to issue an insurance policy: Will this insure me in the event of a natural disaster?
Not to be confused with:
ensure – to secure or guarantee; safeguard; make sure or certain: take measures to ensure success
Abused, Confused, & Misused Words by Mary Embree Copyright © 2007, 2013 by Mary Embree


v. in·sured, in·sur·ing, in·sures
a. To provide or arrange insurance for: a company that insures homeowners and businesses.
b. To acquire or have insurance for: insured herself against losses; insured his car for theft.
2. To make sure, certain, or secure. See Usage Note at assure.
To buy or sell insurance.

[Middle English ensuren, to assure, from Old French enseurer, possibly variant of assurer; see assure.]

in·sur′a·bil′i·ty n.
in·sur′a·ble adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(ɪnˈʃʊə; -ˈʃɔː)
1. (often foll by against) to guarantee or protect (against risk, loss, etc): we insured against disappointment by making an early reservation.
2. (Insurance) (often foll by against) to issue (a person) with an insurance policy or take out an insurance policy (on): his house was heavily insured against fire; after all his car accidents the company refuses to insure him again.
3. another word (esp US) for ensure1, ensure2
Also (rare) (for senses 1, 2): ensure
inˈsurable adj
inˌsuraˈbility n
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ɪnˈʃʊər, -ˈʃɜr)

v. -sured, -sur•ing. v.t.
1. to guarantee against loss or harm.
2. to secure indemnity to or on, in case of loss, damage, or death.
3. to issue or procure an insurance policy on or for.
5. to issue or procure an insurance policy.
[1400–50; late Middle English; variant of ensure]
in•sur`a•bil′i•ty, n.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.


1. 'assure'

If you assure someone that something is true or will happen, you tell them that it is definitely true or will definitely happen, often in order to make them less worried.

"I can assure you that neither of our two goalkeepers will be leaving," O'Leary said.
The government assured the public that there would be no increase in taxes.
2. 'ensure' and 'insure'

In British English, to ensure that something happens means to make certain that it happens.

His reputation was enough to ensure that he was always welcome.

In American English, this word is usually spelled insure.

I shall try to insure that your stay is a pleasant one.
3. 'insure'

Insure has another meaning. In both British and American English, if you insure your property, you pay money to a company so that if the property is lost, stolen, or damaged, the company will pay you a sum of money. In this meaning, the spelling is always insure, not 'ensure'.

Insure your baggage before you leave home.
Collins COBUILD English Usage © HarperCollins Publishers 1992, 2004, 2011, 2012


Past participle: insured
Gerund: insuring

I insure
you insure
he/she/it insures
we insure
you insure
they insure
I insured
you insured
he/she/it insured
we insured
you insured
they insured
Present Continuous
I am insuring
you are insuring
he/she/it is insuring
we are insuring
you are insuring
they are insuring
Present Perfect
I have insured
you have insured
he/she/it has insured
we have insured
you have insured
they have insured
Past Continuous
I was insuring
you were insuring
he/she/it was insuring
we were insuring
you were insuring
they were insuring
Past Perfect
I had insured
you had insured
he/she/it had insured
we had insured
you had insured
they had insured
I will insure
you will insure
he/she/it will insure
we will insure
you will insure
they will insure
Future Perfect
I will have insured
you will have insured
he/she/it will have insured
we will have insured
you will have insured
they will have insured
Future Continuous
I will be insuring
you will be insuring
he/she/it will be insuring
we will be insuring
you will be insuring
they will be insuring
Present Perfect Continuous
I have been insuring
you have been insuring
he/she/it has been insuring
we have been insuring
you have been insuring
they have been insuring
Future Perfect Continuous
I will have been insuring
you will have been insuring
he/she/it will have been insuring
we will have been insuring
you will have been insuring
they will have been insuring
Past Perfect Continuous
I had been insuring
you had been insuring
he/she/it had been insuring
we had been insuring
you had been insuring
they had been insuring
I would insure
you would insure
he/she/it would insure
we would insure
you would insure
they would insure
Past Conditional
I would have insured
you would have insured
he/she/it would have insured
we would have insured
you would have insured
they would have insured
Collins English Verb Tables © HarperCollins Publishers 2011
ThesaurusAntonymsRelated WordsSynonymsLegend: - be careful or certain to do something; make certain of something; "He verified that the valves were closed"; "See that the curtains are closed"; "control the quality of the product"
proofread, proof - read for errors; "I should proofread my manuscripts"
check off, tick off, mark off, tick, check, mark - put a check mark on or near or next to; "Please check each name on the list"; "tick off the items"; "mark off the units"
control - verify by using a duplicate register for comparison; "control an account"
check - verify by consulting a source or authority; "check the spelling of this word"; "check your facts"
double-check - check once more to be absolutely sure
cross-check - check out conflicting sources; crosscheck facts, for example
cinch - make sure of
card - ask someone for identification to determine whether he or she is old enough to consume liquor; "I was carded when I tried to buy a beer!"
spot-check - pick out random samples for examination in order to ensure high quality
verify - confirm the truth of; "Please verify that the doors are closed"; "verify a claim"
ascertain, find out, learn, watch, determine, see, check - find out, learn, or determine with certainty, usually by making an inquiry or other effort; "I want to see whether she speaks French"; "See whether it works"; "find out if he speaks Russian"; "Check whether the train leaves on time"
cover - maintain a check on; especially by patrolling; "The second officer covered the top floor"
verify, control - check or regulate (a scientific experiment) by conducting a parallel experiment or comparing with another standard; "Are you controlling for the temperature?" - make certain ofinsure - make certain of; "This nest egg will ensure a nice retirement for us"; "Preparation will guarantee success!"
guarantee, vouch - give surety or assume responsibility; "I vouch for the quality of my products"
doom - make certain of the failure or destruction of; "This decision will doom me to lose my position"
make - assure the success of; "A good review by this critic will make your play!" - protect by insuranceinsure - protect by insurance; "The insurance won't cover this"
reinsure - insure again by assuming all or a part of the liability of an insurance company already covering a risk
warrant, guarantee - stand behind and guarantee the quality, accuracy, or condition of; "The dealer warrants all the cars he sells"; "I warrant this information"
indemnify - secure against future loss, damage, or liability; give security for; "This plan indemnifies workers against wages lost through illness"
cover - to take an action to protect against future problems; "Count the cash in the drawer twice just to cover yourself"
overcompensate, compensate, cover - make up for shortcomings or a feeling of inferiority by exaggerating good qualities; "he is compensating for being a bad father" - take out insurance for
reinsure - insure again by transferring to another insurance company all or a part of a liability assumed
protect - shield from danger, injury, destruction, or damage; "Weatherbeater protects your roof from the rain"
reinsure - provide additional insurance for
coinsure - take out coinsurance
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.


1. assure, cover, protect, guarantee, warrant, underwrite, indemnify We automatically insure your furniture and belongings against fire.
2. protect, cover, safeguard He needs to insure himself against ambitious party rivals.
Collins Thesaurus of the English Language – Complete and Unabridged 2nd Edition. 2002 © HarperCollins Publishers 1995, 2002


To render certain:
Informal: cinch.
The American Heritage® Roget's Thesaurus. Copyright © 2013, 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
يُؤَمِّنُيَضْمَن، يَكْفَل، يُأمِّن
apdraustidraudimo sutartis
sigorta etmeksigortalamak
bảo hiểm


[ɪnˈʃʊəʳ] VT [+ house, property] → asegurar
to insure sb or sb's lifehacer un seguro de vida a algn
to insure o.s. or one's lifehacerse un seguro de vida
to insure sth against fire/theftasegurar algo contra incendios/robo
to insure one's life for £500,000hacerse un seguro de vida por valor de 500.000 libras
to be insured to do sthtener un seguro que permite hacer algo
I'm insured to drive any cartengo un seguro que me permite conducir cualquier coche
I'm insured to drive my husband's carestoy en el seguro del coche de mi marido
Collins Spanish Dictionary - Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005


[ɪnˈʃʊər ɪnˈʃɔːr] vt [+ person] → assurer; [+ possessions, car, house] → assurer
to insure sb's life → assurer qn sur la vie
to insure one's life → s'assurer sur la vie
to be insured for £50000 [person, possessions] → être assuré(e) pour 50000 livres, être assuré(e) pour une somme de 50000 livres
to be insured against sth [person, possessions] [+ fire, theft] → être assuré(e) contre qch
Collins English/French Electronic Resource. © HarperCollins Publishers 2005


car, houseversichern (lassen) (against gegen); he insured his house contents for £10,000er schloss eine Hausratsversicherung über £ 10.000 ab; to insure one’s lifeeine Lebensversicherung abschließen; to insure oneself against poverty/failure etc (fig)sich gegen Armut/einen Fehlschlag etc (ab)sichern
Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007


[ɪnˈʃʊəʳ] vt (house, car, parcel) to insure (against)assicurare (contro)
to insure o.s. or one's life → assicurarsi (sulla vita)
to insure sb or sb's life → assicurare qn sulla vita
to be insured for £50,000 → essere assicurato/a per 50.000 sterline
Collins Italian Dictionary 1st Edition © HarperCollins Publishers 1995


(inˈʃuə) verb
to arrange for the payment of a sum of money in the event of the loss of (something) or accident or injury to (someone). Is your car insured?; Employers have to insure employees against accident.
inˈsurance noun
the promise of a sum of money in event of loss eg by fire or other disaster, given in compensation by a company etc in return for regular payments. Have you paid the insurance on your jewellery?; (also adjective) insurance companies.
insurance policy
(a document setting out) an agreement with an insurance company.
Kernerman English Multilingual Dictionary © 2006-2013 K Dictionaries Ltd.


يُؤَمِّنُ pojistit forsikre versichern ασφαλίζω asegurar vakuuttaa assurer osigurati assicurare 保険をかける 보증하다 verzekeren forsikre ubezpieczyć assegurar страховать försäkra ประกัน sigortalamak bảo hiểm 投保
Multilingual Translator © HarperCollins Publishers 2009


v. asegurar; asegurarse.
English-Spanish Medical Dictionary © Farlex 2012
Collins Multilingual Translator © HarperCollins Publishers 2009
References in classic literature ?
If he can pay a dividend to his creditors, they will give him his freedom; and he believes he can raise the money if I consent to insure my life."
To insure the greatest efficiency in the dart, the harpooneers of this world must start to their feet from out of idleness, and not from out of toil.
But nothing can insure the hearts on shore against the bitterness of waiting for the worst.
The Beaver's best course was, no doubt, to procure A second-hand dagger-proof coat-- So the Baker advised it-- and next, to insure Its life in some Office of note:
Queequeg believed strongly in anointing his boat, and one morning not long after the German ship Jungfrau disappeared, took more than customary pains in that occupation; crawling under its bottom, where it hung over the side, and rubbing in the unctuousness as though diligently seeking to insure a crop of hair from the craft's bald keel.
I gave him a sufficient dose of veronal to insure his unconsciousness for several hours.
Then the service began--rightly-considered, the most terrible, surely, of all mortal ceremonies--the service which binds two human beings, who know next to nothing of each other's natures, to risk the tremendous experiment of living together till death parts them--the service which says, in effect if not in words, Take your leap in the dark: we sanctify, but we don't insure, it!
A dollar or two should be added to the price usually paid for Janie's shoes, which would insure their lasting an appreciable time longer than they usually did.
To insure steady motion, one tourist and one native walked together.
The relative situation of these States; the number of rivers with which they are intersected, and of bays that wash there shores; the facility of communication in every direction; the affinity of language and manners; the familiar habits of intercourse; -- all these are circumstances that would conspire to render an illicit trade between them a matter of little difficulty, and would insure frequent evasions of the commercial regulations of each other.
These officers said they would take it upon themselves to insure us a cordial reception.
However, while insurers are happy to sell policies of a higher premium, they're even more inclined to insure cars with lower values in order to avoid moral hazard."