"apter" in the adjective sense
1. apt, disposed, given, minded, tending
usually followed by `to') naturally disposed toward
"he is apt to ignore matters he considers unimportant"
"I am not minded to answer any questions"
2. apt, liable
at risk of or subject to experiencing something usually unpleasant
"he is apt to lose"
"she is liable to forget"
3. apt, clever
mentally quick and resourceful
"an apt pupil"
"you are a clever man...you reason well and your wit is bold"-Bram Stoker
4. apposite, apt, pertinent
being of striking appropriateness and pertinence
"the successful copywriter is a master of apposite and evocative verbal images"
"an apt reply"
Source: WordNet® (An amazing lexical database of English)
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