The Chinese word 替换 (tìhuàn), meaning "to replace" or "substitute", is formed through a complementary compound (并列结构) method, where two synonymous or semantically related characters are combined to create a single, reinforced concept. The first character 替 (tì) primarily carries the meaning of "substituting for" or "taking the place of", while the second character 换 (huàn) means "to exchange" or "to swap". When paired together, their meanings converge and amplify to explicitly denote the action of removing one thing and putting another in its place, thereby forming a cohesive verb that is more specific and complete than either character alone.