用不了

to not use all of / to use less than

(completed action marker) / (modal particle indicating change of state, situation now) / (modal particle intensifying preceding clause)

to finish / to achieve / variant of 瞭|了[liao3] / to understand clearly

(of eyes) bright / clear-sighted / to understand clearly

unofficial variant of 瞭[liao4]

no; not so / (bound form) not; un-

to use / to employ / to have to / to eat or drink / expense or outlay / usefulness / hence / therefore

no thanks (used to politely but informally decline)

unable to / without end

(as a resultative verb suffix) unable to (do sth) / (pattern: {verb} + 個|个[ge5] + ~) without end; incessantly