Definition of equivocate:
(v) :
to use words of equivocal or doubtful signification; to express one's opinions in terms which admit of different senses, with intent to deceive; to use ambiguous expressions with a view to mislead; as, to equivocate is the work of duplicity; to render equivocal or ambiguous
"all that Garnet had to say for him was that he supposed he meant to equivocate. -Bp. Stillingfleet."