close friend, bosom buddy / crony, chum

一斉: simultaneous / 一世: first generation / 一声: a voice

一成, 一誠, 一星, 一生, 一清: a male given name

one generation / one lifetime / (monarchy) one East Asian imperial reign / one lifetime / the first generation

voice; cry; shout

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

private; mine

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

a personal or private matter / (by extension) selfishness

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