The story
From de- + rhotacization.
Etymology from Wiktionary, CC BY-SA 4.0.
Today it means: A distortion in (or an Inability to pronounce) the sound of letter R, causing the R to be omitted as a consonant or changing /ɝ/ or /ɚ/ to /ɜ/, /ə/, or another vowel if a vocalic. Full definition →
From de- + rhotacization.
Etymology from Wiktionary, CC BY-SA 4.0.