Where does “西口” come from?

西口 (Japanese) comes from Japanese 口, from Japanese くち, from Japanese 朽ちる.

西口 (Japanese): west exit

Definitions

  1. west exit

Ancestry of “西口”, step by step

西口 traces back through two separate lines of ancestry.

via Japanese

StepLanguageWordMeaning
1Japanesemouth; opening; the mouth
2Japaneseくちmouth
3Japanese朽ちる

via Japanese 西

StepLanguageWordMeaning
1Japanese西west; the West; wind blowing from the west
2JapaneseConjunctive particle. Follows items in a list of...
3Middle Chinese
Every word from Japanese 朽ちるEvery word from Japanese くちEvery word from Japanese