The word 妥当 (tuǒdang) is formed through the morphological process of compounding, where two independent Chinese characters, each with its own meaning, are combined to create a new, nuanced term. The first character, 妥 (tuǒ), carries the core ideas of being "settled", "stable", or "ready". The second character, 当 (dāng), means "proper", "appropriate", or "to serve as". When joined, their meanings synergize: 妥 provides the sense of something being well-arranged and secure, while 当 adds the dimension of suitability and correctness. Thus, the compound 妥当 semantically conveys that something is "properly settled" or "appropriate and well-handled", describing matters that are both stable and fitting, a meaning more complete than either character alone.