unbeknownst

preposition/ˌʌnbɪˈnoʊnst/

Frequency rank: #16,212 most common English word

Meaning

without the knowledge of; unknown to someone.

Illustration for the English word “unbeknownst”

Example sentence

unbeknownst to her parents, she had already booked a flight to Paris.

Synonyms & related words

Practice this word in the quiz

More words in ranks 16,201–16,300