Translation of "unheard-of" - English-Spanish dictionary

unheard-of

adjective uk /ʌnˈhɜːd.ɒv/ us /-ˈhɝːd.ɑːv/

surprising or shocking because not known about or previously experienced

serafín
It was unheard-of for an unmarried couple to live together.

(Translation of “unheard-of” from the Cambridge English-Spanish Dictionary © Cambridge University Press)