Where does “虎の尾” come from?

虎の尾 (Japanese) comes from Japanese 尾, from Old Japanese 尾.

Ancestry of “虎の尾”, step by step

虎の尾 traces back through two separate lines of ancestry.

via Japanese

StepLanguageWordMeaning
1Japanesea tail; the foot of a mountain; the end of...
2Old Japanese

via Japanese

StepLanguageWordMeaning
1Japanesea tiger
Every word from Old Japanese Every word from Japanese