Webster's Revised Unabridged Dictionary · 1913

Equivocate

Equivocate , intransitive verb

[Latin aequivocatus, past participle of aequivocari to be called by the same name, from Latin aequivocus: compare French équivoquer. See Equivocal, a.]

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

Equivocate , transitive verb

To render equivocal or ambiguous.
He equivocated his vow by a mental reservation. — Sir G. Buck