retroflex

(also retroflexed /-kst; -kst/) adj [attrib 作定语] (phonetics 语音) (of a sound) made by bending the tip of the tongue upwards and backwards （指声音）卷舌的, 卷舌音的.

retract, retractability, retractable, retractile, retraction, retread, retreat, retrench, retrenchment, retrial, retribution, retributive, retrievable, retrieval, retrieve, retriever, retro-, retro-rocket, retroactive, retroactively, retrograde, retrogress, retrogression, retrogressive, retrogressively, retrospect, retrospection, retrospective, retrospectively, retrousse, retry, retsina, return, return address, return fare, return game, return match, return ticket, return to..., returnable, returnee,