double, a. [twofold], duplex, bifold, binate; equivocal, Janus-faced, [deceitful], [insincere], [perfidious].

double, v. [duplicate]; [fold], [plait], [pleat].

double, n. [duplicate], counterpart; duplication, [plait], [doubling]; circuit, [maneuver], [shift], [artifice], [stratagem], [ruse].

double-dealing, n. duplicity, dissimulation, [trickery], Machiavelism.

double-faced, a. Janus-faced, [deceitful], [perfidious].

double-headed, a. bicipital, bicipitous.

double-hearted, a. [perfidious], [deceitful], [treacherous], [insincere].

double-minded, a. [irresolute], [vacillating], [unsettled], [undetermined].

doubling, n. duplication, reduplication; [fold], [plait], plication, [double].

doubt, v. [waver], [hesitate], [question], be [undecided], [query]; [distrust], [suspect]. Antonyms: believe, [trust], rely upon.