Where does “尿袋” come from?

尿袋 (Japanese) comes from Japanese 尿, from Japanese 湯, from Old Japanese ゆ, from Proto-Japonic *yu — hot water.

尿袋 (Japanese): bladder

Definitions

  1. bladder

Ancestry of “尿袋”, step by step

尿袋 traces back through two separate lines of ancestry.

via Japanese 尿

StepLanguageWordMeaning
1Japanese尿urine
2Japanese湯warm or hot water; bathwater; a hot spring
3Old Japaneseゆattaches to the
4Proto-Japonic*yuhot water

via Japanese 袋

StepLanguageWordMeaning
1Japanese袋a bag; a sack; a pouch; a segment in a fruit such...
Every word from Proto-Japonic *yu →Every word from Old Japanese ゆ →Every word from Japanese 湯 →