The word 问好 is formed by combining the action of "asking" (问) with the state of "goodness" or "well-being" (好). It conceptually captures the literal gesture of inquiring about someone's welfare, which, as a unified phrase, has come to represent the complete social act of extending a polite greeting or sending regards. It's a direct semantic fusion where the two characters together depict the core idea of "asking if you are well" as a single conventional expression of courtesy.