Swing = 摇摆 [Yáo bǎi]
A white cat tilts its head at a golden lucky cat whose paw swings back and forth, and starts to sway along. Back and forth: 摇摆.
摇摆 (yáo bǎi) means “to sway” or “to swing from side to side.” It can also mean to waver, as when someone cannot make up their mind.
It is a verb. A playground swing is a different word: 秋千 (qiūqiān).
树枝在风中摇摆。 — Shùzhī zài fēng zhōng yáobǎi. — The branches sway in the wind.
他的态度摇摆不定。 — Tā de tàidu yáobǎi bú dìng. — His attitude keeps wavering.