Added 9 October 2026
vacillate
/ˈvæ.sə.leɪt/ verb
In Latin: vacillō Wiktionary
verb Definition from Wiktionary (CC BY-SA). Pronunciation from Wiktionary, via Kaikki.org. More about vacillate at Wordnik → Where our words come from →
- To sway unsteadily from one side to the other; oscillate.
- To swing indecisively from one course of action or opinion to another.
Origin
From Latin vacillātum, supine form of vacillō (“sway, waver”). By surface analysis, Latin vacill- + -ate.
From Wiktionary, via Kaikki.org (CC BY-SA)