oscillate
/ˈɑsɪleɪt/ verb
Forms oscillates oscillating oscillated
- verb (intransitive) To swing back and forth, especially if with a regular rhythm. “A pendulum oscillates slower as it gets longer.”
- verb (intransitive) To vacillate between conflicting opinions, etc. “The mood for change oscillated from day to day.”
- verb (intransitive) To vary above and below a mean value.
Synonyms
Etymology
First attested in 1726; borrowed from Latin ōscillātus, perfect passive participle of Latin ōscillō (“to swing”) (see -ate (verb-forming suffix)), from ōscillum (“a swing”), usually identified with ōscillum (“a little face or mask hung on a tree that sways with the wind”), diminutive of ōs (“mouth, face”). See also osculate.
Webster’s 1913
- verb To move backward and forward; to vibrate like a pendulum; to swing; to sway.
- verb To vary or fluctuate between fixed limits; to act or move in a fickle or fluctuating manner; to change repeatedly, back and forth.
Etymology [L. oscillare to swing, fr. oscillum a swing, a little mask or puppet made to be hung from trees and swing in the wind, prob. orig., a little mouth, a dim. from os mouth. See Oral, and cf. Osculate.]
Sources: Wiktionary · WordNet 3.0 · Webster’s 1913 — from the Wiktionary entry “oscillate”, CC BY-SA 4.0. Details