unbeknownEnglish → SpanishOxford English–Spanishunbeknown /AmE ˌənbəˈnoʊn , BrE ʌnbɪˈnəʊn /, unbeknownst /-ˈnəʊnst/ adverb (literary) unbeknown to sb: unbeknown to me sin yo saberlo unbeknown to the family sin el conocimiento de la familia