apt

(usually followed by `to') naturally disposed toward; "he is apt to ignore matters he considers unimportant"; "I am not minded to answer any questions"

at risk of or subject to experiencing something usually unpleasant; "he is apt to lose"; "she is liable to forget"

mentally quick and resourceful; "an apt pupil"; "you are a clever man...you reason well and your wit is bold"-Bram Stoker

being of striking appropriateness and pertinence; "the successful copywriter is a master of apposite and evocative verbal images"; "an apt reply"