TERGIVERSATE
apostatize, apostatise, tergiversate
(verb) abandon one’s beliefs or allegiances
Source: WordNet® 3.1
Etymology
Verb
tergiversate (third-person singular simple present tergiversates, present participle tergiversating, simple past and past participle tergiversated)
(intransitive) To evade, to equivocate using subterfuge; to obfuscate in a deliberate manner.
(intransitive) To change sides or affiliation; to apostatize.
Synonyms
• (to evade, obfuscate): prevaricate, beat around the bush
• (to change sides): desert
Source: Wiktionary
Ter"gi*ver*sate, v. i. Etym: [L. tergiversatus, p.p. of tergiversari
to turn one's back, to shift; tergum back + versare, freq. of vertere
to turn. See Verse.]
Definition: To shift; to practice evasion; to use subterfuges; to shuffle.
[R.] Bailey.
Source: Webster’s Unabridged Dictionary 1913 Edition