Where does “southwestern” come from?

Southwestern derives from English south, from Old English sūþ, from Proto-Germanic sunþrą, ultimately from Proto-Indo-European sóh₂wl̥ meaning sun, with the directional sense developing from the sun's position.

southwestern (English): Of or pertaining to the southwest

Definitions

  1. Of or pertaining to the southwest

Ancestry of “southwestern”, step by step

southwestern traces back through two separate lines of ancestry.

via English western

StepLanguageWordMeaning
1EnglishwesternOf, facing, situated in, or related to the west;...
2Old Englishwesternewestern
3Proto-Germanicwestrōnijazwestern
4Proto-Germanicwestrazwest, western
5Proto-Indo-Europeanwek(ʷ)sperosevening
6Proto-Indo-Europeanwe-

via English south

StepLanguageWordMeaning
1EnglishsouthOne of the four major compass points,...
2Middle Englishsouthsouth, southernness; A location to the south; the...
3Old Englishsūþsouth
4Proto-Germanicsunþrąsouth; south, southward
5Proto-Indo-Europeansóh₂wl̥sun

Words derived from “southwestern

Every word from Proto-Indo-European we-Every word from Proto-Indo-European wek(ʷ)sperosEvery word from Proto-Germanic westraz