apt

adjective

1. (usually followed by ‘to’) naturally disposed toward"he is apt to ignore matters he considers unimportant"
2. at risk of or subject to experiencing something usually unpleasant"he is apt to lose"
3. mentally quick and resourceful"an apt pupil"
4. being of striking appropriateness and pertinence"the successful copywriter is a master of apposite and evocative verbal images"