full well

== English == === Etymology === From Middle English fol wel, fulwel, from Old English ful wel, equivalent to full +‎ well. Compare Old Norse all-vel (“full well”). === Adverb === full well (not comparable) Very well 2006. Nadia Yassine. Full Sails Ahead. Justice and Spirituality Publications. page 2. He knows full well that I don't like that club. ==== Usage notes ==== Full was formerly used as an adverb in English. This has largely been replaced by fully, but full well remains in common usage, almost always modifying the verb to know. It is sometimes modified to fully well, though this may be seen as incorrect or a hypercorrection. === See also === for a fact === References === Brians, Paul. Common Errors in English Usage. Williams, James Co. 2009.