retroflex

Adjective
  1. Bent or curved backward (synset 300204622)
  2. Pronounced with the tip of the tongue turned back toward the hard palate (synset 300203394)
Verb
  1. Bend or turn backward (synset 202040343)
  2. Articulate (a consonant) with the tongue curled back against the palate (synset 200981443)
    "Indian accents can be characterized by the fact that speakers retroflex their consonants"

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