vi.

1. 擺動
2. 游移不定
3. 【物】振盪

vt.

1. 使擺動
2. 使動搖
3. 【物】使振盪

v.

1. move or swing back and forth in a regular rhythm.
   ▸fluctuate between two states, limits, opinions, etc.
2. Physics  move or vary with periodic regularity.
   ▸cause an electric current or voltage to behave thus.