How do you say “unheard-of” in Vietnamese?

“Unheard-of” in Vietnamese is mới lạ (new).

Vietnamese words for “unheard-of”

• mới lạListenadjective
  Hanoi [məːj˧˦ laː˧˨ʔ] · Saigon [məːj˦˥ laː˨˩˨]mới rising lạ heavy

  new; novel; unheard-of

Translations matched from English Wiktionary (translation tables and Vietnamese entries, via kaikki.org; CC BY-SA 4.0) and the NgonNgu English–Vietnamese dictionary, reviewed and edited; examples from Tatoeba (CC BY 2.0 FR). The Listen button uses your browser's Vietnamese voice.