Synonyms for (adjective) unbeknownst

Synonyms: unbeknown, unbeknownst

Definition: (usually used with `to') occurring or existing without the knowledge of

Usage: a crisis unbeknown to me; she had been ill for months, unbeknownst to the family

Similar words: unknown

Definition: not known

Usage: an unknown amount; an unknown island; an unknown writer; an unknown source