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vigilant

vig·i·lant

vigilant

 
pronunciation:
vI j lnt
features:
Word Explorer
part of speech: adjective
definition: keenly alert and attentive; watchful, esp. for danger.
No one got past the vigilant guards.The family thanked the vigilant nurses who tended their father.
synonyms:
alert, attentive, cautious, observant, wary, watchful
antonyms:
inattentive
similar words:
chary, circumspect, guarded, guardian, jealous, on guard, on the qui vive, prudent, sharp-eyed, sleepless, wakeful, wide-awake
derivation: vigilantly (adv.)
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