Where does “地下水汚染” come from?

地下水汚染 (Japanese) comes from Japanese 地下水, from Japanese 水, from Old Japanese 水, from Proto-Japonic *mentu — water.

地下水汚染 (Japanese): groundwater pollution, groundwater contamination

Definitions

  1. groundwater pollution, groundwater contamination

Ancestry of “地下水汚染”, step by step

地下水汚染 traces back through two separate lines of ancestry.

via Japanese 地下水

StepLanguageWordMeaning
1Japanese地下水underground water
2Japanese水water; drinking water; a fluid, liquid
3Old Japanese水water
4Proto-Japonic*mentuwater

via Japanese 汚染

StepLanguageWordMeaning
1Japanese汚染pollution; contamination
Every word from Proto-Japonic *mentu →Every word from Old Japanese 水 →Every word from Japanese 水 →