English
infralabial
From infra- + labial.
Proto-Indo-European *bʰer- ‘to bear, carry’
…
Proto-Italic *ferō ‘to carry, bear’
Latin ferō ‘to bear’
Latin īnferō ‘to carry, bring, put, place, or throw in,…’
Latin īnfrā ‘below’
English infra-
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’
English labial
Today it means
adj Below the lower lip; said of certain scales of reptiles and fishes.
Language periods are conventional ranges, not dates for this word.
Etymograph / infralabial