come off, become detached / subside (especially of a fever, pain, etc.) / to come off / be taken as (be interpreted in a certain way) / to keep, to maintain / the potential form of 取る, to be obtainable

a safety pin

hold, keep (to a limit), suffice / retain, keep, remain / detain, keep, retain

a button (clothing) / a button (mechanical device)

(chiefly women's speech) first person singular pronoun: I, me

buttonhole (hole for a button)

(computing, graphical user interface) Start button

reset button

(polite) first-person singular pronoun: I, me

a personal or private matter / (by extension) selfishness