English

sublabial

From sub- + labial.

Formed from sub- + labial

Proto-Indo-European *upó ‘up; from below’

Proto-Italic *supo ‘under’

Latin sub ‘under, beneath, below’

English sub-

Proto-Indo-European *leb- ‘to hang down loosely’

Proto-Indo-European *l̥b-yóm

Proto-Italic *labjom

Latin labium ‘a lip’

Medieval Latin labiālis ‘of or pertaining to the lips’

Today it means

adj under the lip

Language periods are conventional ranges, not dates for this word.

Etymograph / sublabial