equivocate

To speak using double meaning; to speak ambiguously, unclearly or doubtfully, with intent to deceive; to vacillate in one's answers, responding with equivoques.

Knock. Knock, knock. Who's there in th'other Deuils Name? Faith here's an Equiuocator, that could ſweare in both the Scales againſt eyther Scale, who committed Treaſon enough for Gods ſake, yet could not equiuocate to Heauen: oh come in, Equiuocator.

All that Garnet had to say for him was that he supposed he meant to equivocate.

To render equivocal or ambiguous.

He equivocated his vow by a mental reservation