a personal or private matter / (by extension) selfishness

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”)

motor, engine

two or more words derive from the same source; cognate

(someone's) words and actions

動物行動学: ethology

schedule, program, timetable