Westerner comes from western + -er, ultimately from Old English west ('west'), from Proto-Germanic *westrą. In current use it is a noun meaning "a native or inhabitant of the west, especially of the Western world". That sense is explained by the older material without requiring a speculative semantic step: the inherited or borrowed base supplies the field of meaning, while the English formation fixes its modern role. The surface form is compositional: its joined elements remain visible in the modern word. The historical chain includes Old English west and Proto-Germanic *westrą. Related English forms include west, western, and westward. The word's history is thus visible in its construction: the components remain interpretable even after the whole expression has settled into a conventional English meaning.