| adjective | (usually followed by `to') having the necessary means or skill or know-how or authority to do something “able to swim” |
| adjective | have the skills and qualifications to do things well “able teachers” |
| adjective | having inherent physical or mental ability or capacity “able to learn” |
| adjective | having a strong healthy body “an able seaman” |
| ability | noun | possession of the qualities (especially mental qualities) required to do something or get something done |
| capableness | noun | the quality of being capable -- physically or intellectually or legally |
| capability | noun | an aptitude that may be developed |