- vacillate (v.)
[vacillate 词源字典]
- 1590s, "to sway unsteadily," from Latin vacillatus, past participle of vacillare "sway to and fro; hesitate" (see vacillation). Meaning "to waver between two opinions or courses" is recorded from 1620s. Related: Vacillated; vacillates; vacillating.[vacillate etymology, vacillate origin, 英语词源]