without someone's knowledge; "unbeknownst to me, she made
all the arrangements" Synonym(s):unbeknown, unbeknownst
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" Synonym(s):unbeknown(p), unbeknownst(p)
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