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precarious

[pri-kair-ee-uh s] /prɪˈkɛər i əs/
adjective
1.
dependent on circumstances beyond one's control; uncertain; unstable; insecure:
a precarious livelihood.
2.
dependent on the will or pleasure of another; liable to be withdrawn or lost at the will of another:
He held a precarious tenure under an arbitrary administration.
3.
exposed to or involving danger; dangerous; perilous; risky:
the precarious life of an underseas diver.
4.
having insufficient, little, or no foundation:
a precarious assumption.
Origin
1640-1650
1640-50; < Latin precārius obtained by entreaty or mere favor, hence uncertain. See prayer1
Related forms
precariously, adverb
precariousness, noun
superprecarious, adjective
superprecariously, adverb
superprecariousness, noun
unprecarious, adjective
unprecariously, adverb
unprecariousness, noun
Synonyms
1. unsure, unsteady. See uncertain. 2. doubtful, dubious, unreliable, undependable. 3. hazardous. 4. groundless, baseless, unfounded.
Antonyms
1. secure. 2. reliable. 3. safe. 4. well-founded.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for unprecarious

precarious

/prɪˈkɛərɪəs/
adjective
1.
liable to failure or catastrophe; insecure; perilous
2.
(archaic) dependent on another's will
Derived Forms
precariously, adverb
precariousness, noun
Word Origin
C17: from Latin precārius obtained by begging (hence, dependent on another's will), from prexprayer1
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 unprecarious
precarious
1646, a legal word, "held through the favor of another," from L. precarius "obtained by asking or praying," from prex (gen. precis) "entreaty, prayer." Notion of "dependent on the will of another" led to sense "risky, dangerous, uncertain" (1687).
Online Etymology Dictionary, © 2010 Douglas Harper
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