smallness; small size, small (sometimes used as an abbreviation for small serving, etc.) / Short for 小の月 (shō no tsuki).

pupil, educatee, student (especially in junior high schools (中学校) or high schools (高校) in Japan)

first-year student of an elementary school

a younger sibling

one’s own younger brother / a younger male / (Kagoshima) younger brother

younger brother / younger male

(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