oscillate
Meaning
to move or swing repeatedly from side to side or between two points
to keep changing between two beliefs, opinions, or courses of action; to waver
Structure
Usage
the fan oscillates to distribute air evenly throughout the room.
his mood seemed to oscillate between extreme optimism and deep despair.
the stock price has been oscillating within a narrow range for weeks.
Etymology
the word oscillate originates from the latin verb oscillare, meaning 'to swing'. this verb was derived from the noun oscillum, which referred to a small mask of bacchus, the god of wine, hung in vineyards to swing with the breeze. this literal image of a swinging object provided the core semantic foundation. over time, the meaning expanded metaphorically to describe any regular back-and-forth movement, and later to the abstract sense of vacillating between opinions or states.
Analysis
oscill (from latin oscillum, a small swing or a mask of bacchus hung from trees to swing in the wind, denoting a swinging motion). ate (a verb-forming suffix of latin origin, indicating an action or process).