おとがい
お
と
が
い
Meanings
1
chin; lower jaw; mentum
usually written using kana aloneanatomy
Anatomical term for the chin or lower jaw. In everyday language, あご is more common; おとがい is used in medical or formal contexts.
The mental nerve innervates the lower lip and the chin region.
We checked the location of the mental foramen in anatomy class.
2
usually written using kana alone
Rare, archaic or highly literary term for a talkative person. Not used in modern everyday speech.
In old language, 'otogai' could refer to a chatterbox.