Something that is unknown to someone or something happening without someone's knowledge.
Examples:
She went to the party unbeknown to her parents.There was a surprise waiting, unbeknown to the guests.Unbeknown to us, the plan was already in action.
Synonyms:
Antonyms:
Unbeknownst
Not known or unnoticed by someone
Examples:
Unbeknownst to him, they planned a surprise party.She slipped away, unbeknownst to the bustling crowd.Unbeknownst to many, the artist lived in seclusion.
Synonyms:
Antonyms:
Ways to tell them apart:
Unbeknown is a less common variant compared to unbeknownst.
Both words mean the same thing but choosing one over the other often depends on regional preference with unbeknownst being more popular in American English.
Think of unbeknownst as an evolved form of unbeknown in everyday speech.
Unbeknownst has an extra st, which might make it feel more complete or formal in some contexts.
Unbeknown without the st might feel slightly more archaic or less formal.