a personal or private matter / (by extension) selfishness

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

personal, private / secret

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

Alternative spelling of 私達 (“we; us”)

private; mine

Christmas cake / (figuratively, humorous) unmarried woman above the age of 25, seen as no longer desirable.

Christmas tree (a tree used during the Christmas holiday season)

white Christmas

(formal) we, us