close friend, bosom buddy / crony, chum

(idiomatic) thoughts buried deep inside the heart

胸: breast, chest, heart, bust / 旨: import, content / 棟: ridge / 宗: religion

宗男: a male given name

宗直: a male given name

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

(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