叔侄 (shū zhí) is a compound noun referring specifically to the relationship between a paternal uncle (the brother of one’s father) and his nephew or niece. The first character 叔 (shū) means ‘paternal uncle’, while 侄 (zhí) means ‘nephew’ (or sometimes ‘niece’ in modern usage, though traditionally it referred only to male relatives). Together, they form a kinship term that emphasizes both sides of this familial bond—not just the uncle or the nephew individually, but their mutual, socially recognized relationship.

This term is commonly used in formal speech, written documents like family trees or legal forms, and respectful conversation about family structure. Unlike English, which often requires two separate words ('uncle and nephew'), Chinese uses this compact, symmetric compound to denote the dyadic relationship itself. It appears frequently in discussions of inheritance, family obligations, traditional rituals, and generational roles within Chinese kinship systems.