Etymology
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oscillate (v.)

1726, intransitive, "to vibrate, move backward and forward," as a pendulum does, a back-formation from oscillation, or else from Latin oscillatus, past participle of oscillare "to swing." Transitive sense of "cause to swing backward and forward" is by 1766. From 1917 in electronics, "cause oscillation in an electric current." Related: Oscillated; oscillating.

updated on October 05, 2019

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Definitions of oscillate from WordNet

oscillate (v.)
be undecided about something; waver between conflicting positions or courses of action;
He oscillates between accepting the new position and retirement
Synonyms: hover / vibrate / vacillate
oscillate (v.)
move or swing from side to side regularly;
Synonyms: vibrate
From wordnet.princeton.edu, not affiliated with etymonline.