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man; male
彼は強い男だ
He is a strong man.
男の子
boy
Can refer to adult males or boys, depending on context.
husband
私の男
My husband
Used informally to refer to one's husband.
'男' is strictly gender-specific. For gender-neutral terms, use '人' (hito) or '方' (kata).
Use '男性' (dansei) in formal contexts, while '男' (otoko) is more casual.
From Middle Chinese 'nan' meaning 'male', originally from Proto-Sino-Tibetan.
In modern Japanese, '男' is often used in compound words and can refer to both adult men and boys. The polite term for 'man' is '男性' (dansei).