equivocal

adj. 1 of double or doubtful meaning. 2 of uncertain nature. 3 (of a person etc.) Questionable.  equivocally adv. [latin voco call]

a. (Literally, called equally one thing or the other; hence:) Having two significations equally applicable; capable of double interpretation; of doubtful meaning; ambiguous; uncertain; as, equivocal words; an equivocal sentence.