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unvigilant

 - 2 dictionary results

vig⋅i⋅lant

  [vij-uh-luhnt]
Use unvigilant in a Sentence
–adjective
1. keenly watchful to detect danger; wary: a vigilant sentry.
2. ever awake and alert; sleeplessly watchful.
Origin:
1470–80; < L vigilant- (s. of vigilāns), prp. of vigilāre to be watchful. See vigil, -ant

Related forms:
vig⋅i⋅lant⋅ly, adverb
vig⋅i⋅lant⋅ness, noun

Synonyms:
2. wide-awake, sleepless. See alert.

Antonyms:
1. careless.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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Word Origin & History

vigilant 
c.1480, from L. vigilantia "wakefulness," from vigilia (see vigil). Vigilance is attested from 1570.
Online Etymology Dictionary, © 2001 Douglas Harper
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