Equivocal, a.
Etymology: [L. aequivocus: aequus equal + vox, vocis, word. See Equal, and Voice, and cf. Equivoque.]
1. (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. For the beauties of Shakespeare are not of so dim or equivocal a nature as to be visible only to learned eyes. Jeffrey.
2. Capable of being ascribed to different motives, or of signifying opposite feelings, purposes, or characters; deserving to be suspected; as, his actions are equivocal. "Equivocal repentances." Milton.
3. Uncertain, as an indication or sign; doubtful. "How equivocal a test." Burke. Equivocal chord (Mus.), a chord which can be resolved into several distinct keys; one whose intervals, being all minor thirds, do not clearly indicate its fundamental tone or root; the chord of the diminished triad, and the diminished seventh.
Syn. -- Ambiguous; doubtful; uncertain; indeterminate. -- Equivocal, Ambiguous. We call an expression ambiguous when it has one general meaning, and yet contains certain words which may be taken in two different senses; or certain clauses which can be so connected with other clauses as to divide the mind between different views of part of the meaning intended. We call an expression equivocal when, taken as a whole, it conveys a given thought with perfect clearness and propriety, and also another thought with equal propriety and clearness. Such were the responses often given by the Delphic oracle; as that to Crambiguous is a mere blunder of language; what is equivocal is usually intended to deceive, though it may occur at times from mere inadvertence. Equivocation is applied only to cases where there is a design to deceive.
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Equivocal, n.
A word or expression capable of different meanings; an ambiguous term; an equivoque. In languages of great ductility, equivocals like that just referred to are rarely found. Fitzed. Hall.
Shades of meaning
Equivocal (L. equus, equal, and vox, voice, word) denotes that which may equally well be understood in either of two or more ways. Ambiguous (L. ambi, around, and ago, drive, lead) signifies lacking in distinctness or certainty, obscure or doubtful through indefiniteness of expression. Ambiguous is applied only to spoken or written statements; equivocal has other applications. A statement is ambiguous when it leaves the mind of the reader or hearer to fluctuate between two meanings, which would fit the language equally well; it is equivocal when it would naturally be understood in one way, but is capable of a different interpretation; an equivocal expression is, as a rule, intentionally deceptive, while an ambiguous utterance may be simply the result of a want either of clear thought or of adequate expression. That which is enigmatical must be guessed like a riddle; a statement may be purposely made enigmatical in order to provoke thought and study. That is doubtful which is fairly open to doubt; that is dubious which has become the subject of doubts so grave as scarcely to fall short of condemnation; as, a dubious reputation. Questionable may be used nearly in the sense either of dubious or of doubtful; a questionable statement is one that must be proved before it can be accepted. To say that one's honesty is questionable is a mild way of saying that in the opinion of the speaker he is likely to prove dishonest. Equivocal is sometimes, tho more rarely, used in this sense. A suspicious character gives manifest reason to be suspected; a suspicious temper is inclined to suspect the motives and intentions of others, with or without reason. Compare clear.