Oscillating
/ˈɑsəˌleɪtɪŋ/
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Definition
(adj) Moving in a repeated back-and-forth motion; coming and going.
Sentence Examples
A seiche is a standing wave oscillating in a body of water.
Life is unpredictable, problematic, oscillating between ups and downs.
CEFR Practice Quiz
The ____ fan moved back and forth across the room, providing a gentle breeze on the hot afternoon.