labiopalatal

Etymology tree Latin labium Ancient Greek -ο- (-o-)der. Latin -o-bor. English -o- English labio- Proto-Indo-European *pleth₂-? Proto-Indo-European *pel-? Proto-Indo-European *pleh₂-osder. Latin palātumder. Old French palatbor. Middle English palate English palate Proto-Indo-European *h₂el-der.? Proto-Italic *-ālis Latin -ālisbor. Old French -albor. ▲ Latin -ālis Old French -elbor. ▲ Latin -ālisbor. Middle English -al English -al English palatal English labiopalatal From labio- + palatal.

来源：wiktionary