Etymology
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avert (v.)

mid-15c., transitive, "turn (something) away, cause to turn away," from Old French avertir "turn, direct; avert; make aware" (12c.), from Vulgar Latin *advertire, from Latin avertere "to turn away; to drive away; shun; ward off; alienate," from ab "off, away from" (see ab-) + vertere "to turn" (from PIE root *wer- (2) "to turn, bend"). The meaning "ward off, prevent the occurrence of" is from 1610s. Related: Averted; averting.

updated on October 01, 2022

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Definitions of avert from WordNet

avert (v.)
prevent the occurrence of; prevent from happening;
avert a strike
Synonyms: debar / forefend / forfend / obviate / deflect / head off / stave off / fend off / avoid / ward off
avert (v.)
turn away or aside;
They averted their eyes when the King entered
Synonyms: turn away
Etymologies are not definitions. From wordnet.princeton.edu, not affiliated with etymonline.