The Chinese word **淫秽** (yínhuì) is a compound term formed by combining two semantically related characters: **淫** (yín), which originally means "excessive" or "overflowing" but has taken on the primary meaning of "lewd," "obscene," or "licentious"; and **秽** (huì), which means "dirty," "filthy," or "impure." Together, they create a synergistic effect where both characters reinforce and specify each other's negative connotations, resulting in a term that specifically denotes something morally dirty and sexually obscene, commonly used in legal and formal contexts to refer to pornography or indecent material. This formation follows the common Chinese lexical pattern of combining near-synonyms to intensify and precise the meaning.