Where does “小指伸筋” come from?

小指伸筋 (Japanese) comes from Japanese 小指, from Japanese 小, from Old Japanese ささ.

小指伸筋 (Japanese): an extensor digiti minimi

Definitions

  1. an extensor digiti minimi

Ancestry of “小指伸筋”, step by step

小指伸筋 traces back through two separate lines of ancestry.

via Japanese 小指

StepLanguageWordMeaning
1Japanese小指a little finger or little toe
2Japanesesmallness; small size, small; Short for 小の月;...
3Old Japaneseささ

via Japanese 伸筋

StepLanguageWordMeaning
1Japanese伸筋an extensor
Every word from Old Japanese ささEvery word from Japanese Every word from Japanese 小指
小指伸筋 — Etymology, Origin & Word History | Etymology Explorer