The word 适合 is formed through a logical and conceptual combination of its two component characters. The first character, 适, carries an inherent sense of "going to" or "being fitting for", implying direction or alignment toward something. The second character, 合, means "to join", "to close", or "to combine", conveying a sense of unity and matching. When fused, the compound creates a holistic idea where one thing aligns with and joins together harmoniously with another, resulting in the meaning of "to suit" or "to be suitable", as the concepts of directed alignment and seamless combination merge into a single notion of appropriateness.