内脚

Etymology
Compound of 🇰🇲.

Cited only to the  of, with the spelling 宇豆阿之; implying that even in the early Heian period, this word was short lived.

Noun

 * 1)  the area behind the knee

Usage notes
This word appears to be a ghost word; this entry is only found in the unabridged version of the , as mentioned in the etymology section only cites this attestation. No other dictionary has this entry.