Oscillate

Part of speech: verb

Pronunciation: /ˈɑsɪleɪt/

Definitions

1. To swing or move back and forth in a steady, rhythmic manner while alternating positions or opinions between two extremes
2. To exhibit a repeating vibration or motion around a central point and to fluctuate between two differing ideas or conditions intermittently
3. To alternate or swing repeatedly between two points, positions, or states, often in a smooth, continuous motion

Etymology: Before it meant to swing back and forth, the Latin root "oscillum" named a small carved face or mask hung in a tree, which swayed and turned as the wind blew. Roman gardeners and festival-goers hung these ornaments among the branches, and the word's diminutive form traces back to "os," meaning "mouth" or "face." That lineage also links it to "osculate," a sibling word from the same stem that originally meant to kiss. English borrowed the word in its Latin participle form, "oscillatus," arriving in 1726 with the sense of swinging from side to side. The "-ate" ending is the familiar Latin verb-forming suffix that English still uses in words like "activate" and "regulate."

Synonyms: swing, vibrate, waver, fluctuate, alternate

Antonyms: stabilize, remain, steady, persist, settle