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tr.v. en·sured, en·sur·ing, en·sures
To make sure or certain; insure: Our precautions ensured our safety. See Usage Note at assure.

[Middle English ensuren, from Anglo-Norman enseurer : Old French en-, causative pref.; see en-1 + Old French seur, secure, variant of sur; see sure.]


(ɛnˈʃʊə; -ˈʃɔː) or


vb (tr)
1. (may take a clause as object) to make certain or sure; guarantee: this victory will ensure his happiness.
2. to make safe or secure; protect
enˈsurer n


(ɛnˈʃʊər, -ˈʃɜr)

v.t. -sured, -sur•ing.
1. to secure or guarantee: This letter will ensure you a hearing.
2. to make sure or certain.
3. to make secure or safe, as from harm.
[1350–1400; Middle English < Anglo-French enseurer. See en-1, sure]
en•sur′er, n.


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.


Past participle: ensured
Gerund: ensuring

I ensure
you ensure
he/she/it ensures
we ensure
you ensure
they ensure
I ensured
you ensured
he/she/it ensured
we ensured
you ensured
they ensured
Present Continuous
I am ensuring
you are ensuring
he/she/it is ensuring
we are ensuring
you are ensuring
they are ensuring
Present Perfect
I have ensured
you have ensured
he/she/it has ensured
we have ensured
you have ensured
they have ensured
Past Continuous
I was ensuring
you were ensuring
he/she/it was ensuring
we were ensuring
you were ensuring
they were ensuring
Past Perfect
I had ensured
you had ensured
he/she/it had ensured
we had ensured
you had ensured
they had ensured
I will ensure
you will ensure
he/she/it will ensure
we will ensure
you will ensure
they will ensure
Future Perfect
I will have ensured
you will have ensured
he/she/it will have ensured
we will have ensured
you will have ensured
they will have ensured
Future Continuous
I will be ensuring
you will be ensuring
he/she/it will be ensuring
we will be ensuring
you will be ensuring
they will be ensuring
Present Perfect Continuous
I have been ensuring
you have been ensuring
he/she/it has been ensuring
we have been ensuring
you have been ensuring
they have been ensuring
Future Perfect Continuous
I will have been ensuring
you will have been ensuring
he/she/it will have been ensuring
we will have been ensuring
you will have been ensuring
they will have been ensuring
Past Perfect Continuous
I had been ensuring
you had been ensuring
he/she/it had been ensuring
we had been ensuring
you had been ensuring
they had been ensuring
I would ensure
you would ensure
he/she/it would ensure
we would ensure
you would ensure
they would ensure
Past Conditional
I would have ensured
you would have ensured
he/she/it would have ensured
we would have ensured
you would have ensured
they would have ensured
ThesaurusAntonymsRelated WordsSynonymsLegend:
Verb1.ensure - make certain ofensure - 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!"
2.ensure - 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?"


1. make certain, guarantee, secure, make sure, confirm, warrant, certify Steps must be taken to ensure this never happens again.
2. protect, defend, secure, safeguard, guard, make safe The plan is aimed at ensuring the future of freshwater fish species.


To render certain:
Informal: cinch.
يَتَأَكَّدُيَضْمَن، يُؤَمِّن
sikresørge for
tryggja, ganga úr skugga um
bảo đảm


[ɪnˈʃʊəʳ] VTasegurar (that que)


[ɪnˈʃʊər] vt
[+ peace, stability, safety, security, survival] → assurer, garantir; [+ victory, success] → assurer
to ensure (that) ... (= make it certain) [thing] → garantir que ...
an attempt to ensure that there would not be a third attack → une tentative de garantir qu'il n'y aurait pas de troisième attaque
(= make sure that) [person] to ensure (that) ... → s'assurer que ...
You should ensure you do not miss the deadline → Assurez-vous de ne pas dépasser la date butoir.


vtsicherstellen; (= secure)sichern; will you ensure that I get a seat?sorgen Sie dafür, dass ich einen Platz bekomme?


[ɪnˈʃʊəʳ] vtgarantire, assicurare
to ensure that ... → assicurarsi che...


(inˈʃuə) verb
to make sure. Ensure that your television set is switched off at night.


يَتَأَكَّدُ zajistit sikre sicherstellen διασφαλίζω asegurar, asegurarse varmistaa s’assurer que osigurati assicurare 保証する 보장하다 ervoor zorgen sørge for zapewnić assegurar гарантировать garantera ทำให้แน่ใจว่า garantiye almak bảo đảm 保证
References in classic literature ?
They had that interest, as well as other interests, in ensuring their impunity from exposure, and they would leave no stone unturned, no sacrifice unattempted, no treachery untried, to discover the place in which their victim was concealed, and to part her from the only friends she had in the world--Marian Halcombe and myself.
All her powers since morning had been concentrated on ensuring that they all- she herself, Mamma, and Sonya- should be as well dressed as possible.
On the directives of the Commissioner, the DC directed to take special measures for ensuring that all areas in the city were provided with ample water supply.
Preheating also has the added benefit of ensuring that the mixer batch is not cooled when these liquids are introduced.
That's in addition, naturally, to managing pest and plant diseases, enhancing yields, ensuring soil vitality season after season and more.
In other words, the regulation makes the insurance company responsible for ensuring its agents and brokers take appropriate steps to prevent money laundering or terrorist funding.
The most challenging part of any key management system is ensuring that, once a key has been exposed or retired, or the data media on which it was stored has been lost, deleted, stolen, or replaced so it cannot be recovered by any malicious party.
We enhance our wealth by ensuring a supply of energy and materials, and by facilitating construction and land use management.
The key to ensuring airworthiness and successful integration of anything in a complex system is system safety engineering, the function that joins together the disparate engineering functions and test and evaluation and that ensures the overall safety of the components, integration, and design.
a leading provider of proven enterprise IT reliability solutions for business continuity, has introduced the next generation of its high availability solution SteelEye LifeKeeper for mySAP Business Suite, the first and only single solution for ensuring high availability of mySAP Business Suite on Linux.
Ponce, who will be in charge of ensuring security within and around the airport, was selected in September as the assistant federal security director for inspection at Burbank and Long Beach airports.
Ensuring that the firm has documented natural hazards, as well as technical hazards (unauthorized intrusions) are key.