The Chinese word 疲劳 (píláo), meaning "fatigue" or "exhaustion", is a compound formed by combining two semantically related characters: 疲 (pí), which means "tired" or "weary", and 劳 (láo), which means "labor", "toil", or "strain". In this coordinative or synonymous compound, both components contribute similar meanings related to weariness from exertion. The character 疲 emphasizes the state of being depleted or exhausted, while 劳 highlights the cause, hard work or overexertion. Together, they create a more nuanced and emphatic term than either character alone, perfectly capturing the concept of physical or mental fatigue resulting from sustained effort, following a common pattern in Chinese where two characters with overlapping meanings are joined to reinforce a single idea.