Vacillate (verb)
vas-ul-ayt
to waver in mind or opinion; be indecisive or irresolute./ to sway or oscillate
First recorded in 1590–1600; from Latin vacillātus (past participle of vacillāre “to sway to and fro”); -ate
Example sentences
“His habit to vacillate on every decision made him a poor leader”
Author Juno Dawson, and author and BookToker Andy Darcy Theo are joining the judging panel for 2026’s YA Book Prize. Celebrating the best YA fiction in the UK & Ireland…







