English
illabial
From il- + labial.
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 Not labial; unrounded or unlabialized.
Language periods are conventional ranges, not dates for this word.
Etymograph / illabial