The word 成功 is formed by combining two independent characters, each with its own meaning, to create a new, unified concept. The first character, 成 (chéng), carries the core idea of "to complete", "to finish", or "to accomplish". The second character, 功 (gōng), contributes the notion of "achievement", "merit", or "work". When fused, their meanings conceptually merge: the accomplishment (成) of a meaningful work or merit (功) naturally defines the state of "success". Thus, the formation is a logical, semantic fusion where the combined sense of the parts directly and intuitively points to the whole.