名詞 oscillation:

1. the process of oscillating between states
2. (physics) a regular periodic variation in value about a mean
   同義詞：vibration
3. a single complete execution of a periodically repeated phenomenon
   同義詞：cycle

1. Her oscillations in mood are maddening.
   她喜怒無常能把人氣瘋。

os.cil.la.tion

n.（名詞）

The act of oscillating.
擺動：搖擺擺動的動作
The state of being oscillated.
被擺來擺去的狀態(tài)
A single oscillatory cycle.
單一振動循環(huán)

【引伸】
os.cilla.tional
adj.（形容詞）