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infallible

[in-fal-uh-buh l] /ɪnˈfæl ə bəl/
adjective
1.
absolutely trustworthy or sure:
an infallible rule.
2.
unfailing in effectiveness or operation; certain:
an infallible remedy.
3.
not fallible; exempt from liability to error, as persons, their judgment, or pronouncements:
an infallible principle.
4.
Roman Catholic Church. immune from fallacy or liability to error in expounding matters of faith or morals by virtue of the promise made by Christ to the Church.
noun
5.
an infallible person or thing.
Origin
late Middle English
1375-1425
1375-1425; late Middle English < Medieval Latin infallibilis. See in-3, fallible
Related forms
infallibility, infallibleness, noun
infallibly, adverb
noninfallible, adjective
noninfallibly, adverb
Synonyms
1, 2. See reliable.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for infallibly
  • My spirits infallibly rise in proportion to the outward dreariness.
  • There's even one of those dogs that can infallibly smell a supernatural presence and, naturally, there's a car chase.
  • Hail the spirit of our infallibly peaceful coexistence.
  • My spirits infallibly rise in proportion to the outward dreariness.
  • My spirits infallibly rise in proportion to the outward dreariness.
  • Rudimentary organs will speak infallibly with respect to the nature of long-lost structures.
  • Bluffly outgoing, infallibly at ease in large groups, he seemed inhibited by screen intimacy.
  • However, this obligation does not require that a lawyer use only infallibly secure methods of communication.
  • Frequent war and constant apprehension, which require a state of as constant preparation, will infallibly produce them.
  • The people, by throwing themselves into either scale, will infallibly make it preponderate.
British Dictionary definitions for infallibly

infallible

/ɪnˈfæləbəl/
adjective
1.
not fallible; not liable to error
2.
not liable to failure; certain; sure: an infallible cure
3.
completely dependable or trustworthy
noun
4.
a person or thing that is incapable of error or failure
Derived Forms
infallibility, infallibleness, noun
infallibly, adverb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for infallibly

infallible

adj.

early 15c., from Medieval Latin infallibilis, from in- "not, opposite of" (see in- (1)) + Late Latin fallibilis (see fallible). In reference to Popes, attested from 1870. Related: Infallibly.

Online Etymology Dictionary, © 2010 Douglas Harper
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