close friend, bosom buddy / crony, chum

Short for サラリーマン (sararīman, “businessman”).

A transliteration of the German surname Riemann

A transliteration of the English surname Lehman

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

(mathematics) Riemannian geometry

(mathematics, geometry) Riemannian geometry

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

a personal or private matter / (by extension) selfishness

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