Where does “大雨” come from?

大雨 (Japanese) comes from Japanese 大, from Old Japanese 大, from Proto-Japonic əpə — big, large; many.

大雨 (Japanese): heavy rain, downpour; drenching rains

Definitions

  1. heavy rain, downpour; drenching rains

Ancestry of “大雨”, step by step

大雨 traces back through two separate lines of ancestry.

via Japanese 大

StepLanguageWordMeaning
1Japanese大big, large; the large part of; arch-
2Old Japanese大big, large; large
3Proto-Japonicəpəbig, large; many

via Japanese 雨

StepLanguageWordMeaning
1Japanese雨rain, rainfall; a rainy weather; something...
2Middle Chinese雨—
Every word from Proto-Japonic əpə →Every word from Old Japanese 大 →Every word from Japanese 大 →