unbeknown Hear it!

unbeknown definition

un·be·known (-bē nōn′)

adjective

unknown or unperceived; without one's knowledge: usually with to
also unbeknownst un′·be·knownst′ (-nōnst′)

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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