-able (Adjective) — (usually followed by 'to') having the necessary means, skill, know-how or authority to do something. ex. "able to swim" ex. "she was able to program her computer" ex. "we were at last able to buy a car" ex. "able to get a grant for the project"
-able (Adjective) — Having the skills and qualifications to do things well. ex. "able teachers"
-able (Adjective) — Having inherent physical or mental ability or capacity. ex. "able to learn" ex. "human beings are able to walk on two feet" ex. "Superman is able to leap tall buildings"
-able (Adjective) — Having a strong healthy body. ex. "an able seaman" ex. "every able-bodied young man served in the army"
-able (Other) — Able to be, subject to.