retroflex

动词 retroflex:

1. bend or turn backward
   同义词：replicate
2. articulate (a consonant) with the tongue curled back against the palate

形容词 retroflex:

1. bent or curved backward
   同义词：retroflexed
2. pronounced with the tip of the tongue turned back toward the hard palate
   同义词：cacuminal

ret.ro.flex

adj.also （形容词） 也作
retroflexed
Bent, curved, or turned backward.
后折的，后弯的，或向后转的
Linguistics Pronounced with the tip of the tongue turned back against the roof of the mouth.
【语言学】 卷舌音的：将舌尖向后卷抵住口中硬腭而发音的
n.（名词）
Linguistics A sound pronounced with the tongue in retroflex position, as the sound (r) in some varieties of English.
【语言学】 卷舌音：舌尖处于卷舌音状态时发出的声音，如英语的一些变种音(r)

来源：
Latin *retrôflexus [past participle of] retrôflectere [to bend back]
拉丁语 *retrôflexus [] retrôflectere的过去分词 [向后弯]
retrô [retro-]
retrô [表示.向后.]
flectere [to bend]
flectere [弯曲]

【引伸】
ret.roflex.ion 或
ret.roflec.tion
n.（名词）