人の陰口を言ってはいけない。

man; person; human being; mankind; people; human (Homo sapiens); humans as a species; character; personality; man of talent; true man; another person; other people; others; adult

indicates possessive; nominalizes verbs and adjectives; substitutes for "ga" in subordinate phrases; (at sentence-end, falling tone) indicates a confident conclusion; (at sentence-end) indicates emotional emphasis; (at sentence-end, rising tone) indicates question

malicious gossip; backbiting; speaking ill behind someone's back

indicates direct object of action; indicates subject of causative expression; indicates an area traversed; indicates time (period) over which action takes place; indicates point of departure or separation of action; indicates object of desire, like, hate, etc.

to say; to utter; to declare; to name; to call; to go (e.g. "the alarm went ping"); to make a noise

if ... then; when; and; why don't you...?; the more (one does something); because; since