close friend, bosom buddy / crony, chum

grey

the color grey / being in between two distinct states or conditions, as in a figurative grey area

katakana spelling of English surname Grey or Gray

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

(historical) ISDN public telephone

silver hair of a middle-aged man

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

a personal or private matter / (by extension) selfishness

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