knack

1 a clever often underhanded means to achieve an end she's tried every knack in Cupid's book to get her guy to marry her Synonyms artifice, device, dodge, fetch, flimflam, gambit, gimmick, jig, juggle, trick, play, ploy, scheme, shenanigan, sleight, stratagem, wileRelated Words bluff, end run, feint; cheating, chicanery, cozenage, craft, crookery, cunning, deception, dupery, duplicity, fakery, jugglery, legerdemain, skulduggery (or skullduggery), subterfuge, swindling, trickery; fraud, gaff, hoax, sham, swindle; blind, front, smoke screen

2 a special and usually inborn ability a jazz musician with an incredible knack for improvisation Synonyms aptitude, bent, endowment, faculty, flair, genius, gift, head, talentRelated Words affinity, bias, disposition, habitude, impulse, inclination, leaning, partiality, penchant, predilection, predisposition, proclivity, propensity, tendency, turn; ear, eye, mind, nose; feel, hang, instinct, touch, way; capability, competence, facility, proficiency, skill; capacity, potential, power; forte, specialism, speciality, specialtyNear Antonyms disability, handicap, inability, incapacity; shortcoming, weakness