(idiomatic) to do one's best; to do something to the best of one's ability

the best

To exhaust; deplete; use up. / serve, assist

to do to exhaustion, to do something completely

examination, exam, test / quiz

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

Alternative spelling of 私達 (“we; us”)

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

a personal or private matter / (by extension) selfishness

personal, private / secret