verb (used without object), ter·gi·ver·sat·ed, ter·gi·ver·sat·ing.
to change repeatedly one's attitude or opinions with respect to a cause, subject, etc.; equivocate.
to turn renegade.
Origin: 1645–55; < Latintergiversātus (past participle of tergiversārī to turn one's back), equivalent to tergi- (combining form of tergum back) + versātus, past participle of versāre, frequentative of vertere to turn; see -ate1