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reliable

[ri-lahy-uh-buh l] /rɪˈlaɪ ə bəl/
adjective
1.
that may be relied on or trusted; dependable in achievement, accuracy, honesty, etc.:
reliable information.
Origin
1560-1570
1560-70; rely + -able
Related forms
reliability, reliableness, noun
reliably, adverb
nonreliable, adjective
nonreliableness, noun
nonreliably, adverb
quasi-reliable, adjective
quasi-reliably, adverb
ultrareliable, adjective
ultrareliablely, adverb
Synonyms
trusty, authentic, consistent. Reliable, infallible, trustworthy apply to persons, objects, ideas, or information that can be depended upon with confident certainty. Reliable suggests consistent dependability of judgment, character, performance, or result: a reliable formula, judge, car, meteorologist. Infallible suggests the complete absence of error, breakdown, or poor performance: an infallible test, system, marksman. Trustworthy emphasizes the steady and honest dependability which encourages one's confidence, belief, or trust: trustworthy and accurate reports.
Antonyms
undependable, questionable, deceitful.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for re liable

reliable

/rɪˈlaɪəbəl/
adjective
1.
able to be trusted; predictable or dependable
Derived Forms
reliability, (rare) reliableness, noun
reliably, adverb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for re liable

reliable

adj.

1560s, raliabill, Scottish; see rely + -able. Not common before 1850; and sometimes execrated thereafter in Britain as an Americanism because it involves a use of -able different from its use in provable, etc., but defended (by OED, Century Dictionary, etc.) on grounds of use of the suffix in available, laughable, etc.. Related: Reliably.

Online Etymology Dictionary, © 2010 Douglas Harper
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