the word 'polite' entered english in the late 15th century from the latin past participle 'politus', meaning 'polished, refined, accomplished'. this latin term itself derives from the verb 'polire', to polish or smooth. the semantic journey is a clear metaphor: just as a rough surface is made smooth and shiny through polishing, so too were a person's manners and speech considered refined and elegant through cultivation. the word passed through old french 'poli', which reinforced its social connotations of polished courtesy, before solidifying in english to describe considerate, well-mannered behavior.

the word is a simplex unit derived from latin, where the spelling and meaning were altered through french. it is not productively formed from separable english morphemes.