S: (n) bent, knack, hang (a special way of doing something) "he had a bent for it"; "he had a special knack for getting into trouble"; "he couldn't get the hang of it"
S: (n) flair, genius (a natural talent) "he has a flair for mathematics"; "he has a genius for interior decorating"
S: (n) instinct, inherent aptitude (inborn pattern of behavior often responsive to specific stimuli) "the spawning instinct in salmon"; "altruistic instincts in social animals"