a personal or private matter / (by extension) selfishness

personal, private / secret

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

private; mine

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

tutor; coach

failed creation; failure

loser, (a social) failure, also-ran

everything

(colloquial) current boyfriend