See knack in Webster's New World Roget's A-Z Thesaurus II
The proper method for doing, using, or handling something:
feel, trick. (Informal) hang. See abilityNatural or acquired facility in a specific activity:
ability, adeptness, art, command, craft, expertise, expertness, mastery, proficiency, skill, technique. (Informal) know-how. See ability, knowledgeAn innate capability:
aptitude, aptness, bent, faculty, flair, genius, gift, head, instinct, talent, turn. See ability, approachLearn more about knack