to change repeatedly one's attitude or opinions with respect to a cause, subject, etc.; equivocate.
2.
to turn renegade.
Origin: 1645–55; < Latin tergiversātus (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
turning dishonestly from a straightforward action or statement; shifting, shuffling, equivocation, 1570, from L. tergiversationem (nom. tergiversatio) "a shifting, evasion," from tergiversari "turn one's back on, evade," from tergum "the back" (of unknown origin) + versare "to spin, turn" (see