un·re·li·a·ble

(ŭn′rĭ-lī′ə-bəl)

adj.

Marked by or exhibiting a lack of reliability.

un′re·li′a·bil′i·ty, un′re·li′a·ble·ness n.

un′re·li′a·bly adv.

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.

unreliable

(ˌʌnrɪˈlaɪəbəl)

adj

not reliable; untrustworthy: an unreliable witness.

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

ThesaurusAntonymsRelated WordsSynonymsLegend:

Adj.	1.	unreliable - liable to be erroneous or misleading; "an undependable generalization" undependable fallible - likely to fail or make errors; "everyone is fallible to some degree"
	2.	unreliable - not worthy of reliance or trust; "in the early 1950s computers were large and expensive and unreliable"; "an undependable assistant" undependable untrustworthy, untrusty - not worthy of trust or belief; "an untrustworthy person" dependable, reliable - worthy of reliance or trust; "a reliable source of information"; "a dependable worker"
	3.	unreliable - dangerously unstable and unpredictable; "treacherous winding roads"; "an unreliable trestle" treacherous dangerous, unsafe - involving or causing danger or risk; liable to hurt or harm; "a dangerous criminal"; "a dangerous bridge"; "unemployment reached dangerous proportions"
	4.	unreliable - lacking a sense of responsibility irresponsible - showing lack of care for consequences; "behaved like an irresponsible idiot"; "hasty and irresponsible action"

unreliable

adjective

1. inaccurate, unconvincing, implausible, mistaken, false, uncertain, fake, deceptive, erroneous, unsound, fallible, specious, delusive The figures were unreliable because the sample sizes were too small.
inaccurate accurate, infallible

2. undependable, irresponsible, untrustworthy, unstable, treacherous, disreputable, not conscientious She had proved to be an unreliable witness and had lied to police.
undependable reliable, dependable, trustworthy, responsible, stable, conscientious

Collins Thesaurus of the English Language – Complete and Unabridged 2nd Edition. 2002 © HarperCollins Publishers 1995, 2002

unreliable

adjective

1. So weak or defective as to be liable to fail:

trick, undependable.

2. Not to be depended on:

undependable, untrustworthy.

Translations

لا يـُمْكِنُ الاِعْتِمَادُ عَلَيْه

nespolehlivý

upålidelig

epäluotettava

nepouzdan

alterabile inaffidabile inattendibile non affidabile

あてにならない

신뢰할 수 없는

onbetrouwbaar

upålitelig

zawodny

não confiável não fiável

ненадежный

nezanesljiv

opålitlig

ไว้ใจไม่ได้

güvenilmez

không đáng tin cậy

不可靠的

unreliable

[ˈʌnrɪˈlaɪəbl] ADJ [person] → informal, poco de fiar; [machine, service] → poco fiable, que no es de fiar; [information, statistics] → poco fiable; [weather, climate] → variable, inestable
they thought British workers were unreliable → opinaban que a los trabajadores británicos les faltaba formalidad, opinaban que los trabajadores británicos eran muy informales or no eran muy de fiar
the phones here are unreliable → los teléfonos aquí son poco fiables or no son de fiar
my memory is so unreliable these days → mi memoria no es muy de fiar últimamente

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

unreliable

[ˌʌnrɪˈlaɪəb^əl] adj

[person] → sur qui on ne peut pas compter, peu fiable
He's completely unreliable → On ne peut pas du tout compter sur lui.

[car, machine] → peu fiable; [method, judgement] → peu fiable
It's a nice car, but a bit unreliable → C'est une belle voiture, mais elle n'est pas très fiable.

[evidence] → insuffisant(e)
to acquit due to unreliable evidence → acquitter faute de preuves concluantes

unreliable

adj → unzuverlässig; to prove (to be) unreliable → sich als unzuverlässig erweisen

Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007

unreliable

[ˌʌnrɪˈlaɪəbl] adj (person) → su cui non si può contare or fare affidamento; (source) → inattendibile; (firm) → poco serio/a; (car, machine) → che non dà affidamento

unreliable

→ لا يـُمْكِنُ الاِعْتِمَادُ عَلَيْه nespolehlivý upålidelig unzuverlässig αναξιόπιστος informal epäluotettava imprévisible nepouzdan inaffidabile あてにならない 신뢰할 수 없는 onbetrouwbaar upålitelig zawodny não confiável, não fiável ненадежный opålitlig ไว้ใจไม่ได้ güvenilmez không đáng tin cậy 不可靠的