close friend, bosom buddy / crony, chum

a male given name

賢一, 健一, 憲一, 謙一, 建一, 研一, 兼一: a male given name / 賢壱, 健壱, 憲壱, 謙壱, 建壱, 研壱, 兼壱: a male given name / 賢壹, 健壹, 憲壹, 謙壹, 建壹, 研壹, 兼壹: a male given name / 賢市, 健市, 憲市, 謙市, 建市, 研市, 兼市: a male given name

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

健一朗: a male given name / 健一郎: a male given name / 健一狼: a male given name

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

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