‘落成’ is a formal verb used exclusively to describe the completion of buildings, monuments, bridges, or other large-scale construction projects. Literally, 落 (luò) means ‘to settle’ or ‘to come down’, and 成 (chéng) means ‘to succeed’ or ‘to be accomplished’; together, they evoke the idea of a structure finally settling into its completed, functional state. It emphasizes the ceremonial or official moment when construction ends and the building becomes ready for use.

This term carries a sense of significance and permanence—it’s not used for ordinary repairs, renovations, or small DIY projects. You’ll commonly encounter it in news reports, government announcements, commemorative plaques, and formal speeches. It often appears with time phrases (e.g., ‘于2023年落成’) or passive constructions (e.g., ‘新图书馆已于上月落成’). Unlike general verbs like ‘建成’, 落成 implies an official or milestone-level completion, sometimes accompanied by an opening ceremony.