- retroflex (adj.)
[retroflex 词源字典]
- 1776, from Modern Latin retroflexus, past participle of retroflectere "to bend back," from retro (see retro-) + flectere "to bend" (see flexible). The verb (1898) is a back-formation from retroflexed (1806), from the adjective.[retroflex etymology, retroflex origin, 英语词源]