The Chinese word 粗俗 (cūsú), meaning "vulgar" or "coarse", is a compound word formed through the combination of two independent, meaningful characters (morphemes) that reinforce a similar concept. The first character, 粗 (cū), originally meant "coarse" or "rough" (as in unrefined grain) and by extension denotes crudeness or lack of refinement. The second character, 俗 (sú), means "common", "customary", or "vulgar", often carrying a negative connotation of being lowbrow or unsophisticated. When combined, 粗 intensifies the negative, unrefined aspect of 俗, creating a single term where the whole meaning ("vulgar and crude") is essentially the sum of its reinforcing parts, a common pattern in Chinese morphology known as a coordinative or synonymous compound.