nonrhotic

/nɑnˈroʊtɪk/
adjective
  1. Describing a dialect or accent of English in which the sound /r/ is not pronounced unless it is followed by a vowel (e.g., 'car' sounds like 'cah').
    • Her nonrhotic pronunciation made 'hard' and 'ha'd' sound the same.
    • In nonrhotic dialects, the word 'letter' is pronounced without the final 'r' sound.
    • Many speakers of British English have a nonrhotic accent, so they drop the 'r' in words like 'farm'.
Antonyms
What does "nonrhotic" mean? | whatsthatwordmean | whatsthatwordmean