堪能

Verb

 * 1) can; to be able to
 * 2) to be skilled in

Etymology 1
Shift from 足んぬ (tannu),  itself a shift in pronunciation from 足りぬ (tarinu):.

The kanji form is. Its regular, , contaminated the reading , shifting the pronunciation to and giving it the sense “proficient, skilled”.

Noun

 * 1) satisfaction, satiety

Adjective

 * 1) proficient, skilled

Verb

 * 1) to enjoy; to receive pleasure or satisfaction from something

Noun

 * 1)  patience, perseverance

Verb

 * 1) to be satisfied, to be content