The Chinese word 粪便 (fènbiàn), meaning "feces" or "excrement", is a binomial compound formed by combining two synonymous or closely related characters: 粪 (fèn), which originally refers to animal manure or waste used as fertilizer, and 便 (biàn), a more general and euphemistic term for human excrement or bodily waste. This type of compounding is common in Chinese to create a formal, technical, or comprehensive term; by pairing two semantic elements from the same conceptual domain, the word gains precision and a neutral, scientific register, distinguishing it from cruder singular terms. Thus, 粪便 functions as a single lexical unit that encompasses both human and animal waste in a clinical or standard context.