Where does “一雨” come from?

一雨 (Japanese) comes from Japanese 一, from Japanese 始め, from Japanese 始める — begin; start; initiate; originate.

一雨 (Japanese): a single rainfall; a single brief rain shower

Definitions

  1. a single rainfall; a single brief rain shower

Ancestry of “一雨”, step by step

一雨 traces back through two separate lines of ancestry.

via Japanese 一

StepLanguageWordMeaning
1Japanese一one, 1; "term relating to the number one"; unity
2Japanese始めbeginning, the start of an activity or time...
3Japanese始めるbegin; start; initiate; originate

via Japanese 雨

StepLanguageWordMeaning
1Japanese雨rain, rainfall; a rainy weather; something...
2Middle Chinese雨—
Every word from Japanese 始める →Every word from Japanese 始め →Every word from Japanese 一 →