Found 2 items, similar to unbeknown.
English → English (WordNet) Definition: unbeknown unbeknown adj : (usually used with `to') occurring or existing without the knowledge of; “a crisis unbeknown to me”; “she had been ill for months, unbeknownst to the family” [syn: unbeknown(p), unbeknownst(p)] adv : without someone's knowledge; “unbeknownst to me, she made all the arrangements” [syn: unbeknownst]
English → English (gcide) Definition: Unbeknown Unbeknown \Un`be*known"\, a. Not known; unknown. [Colloq.] [1913 Webster]