a personal or private matter / selfishness / privacy, secrecy / (women's speech, obsolete) a brother-in-law

personal, private / secret

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

Alternative spelling of 私達 (“we; us”)

plural of 子供: children

child's naive mind, child's juvenile mind

(figuratively) to wear out with one's heart and soul

cry one's eyes out

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

use every possible means