ad-lib
Merriam-Webster's Word of the Day for November 4, 2021 is:
ad-lib \AD-LIB\ verb
Ad-lib means "to improvise" or "to deliver spontaneously."
// The actor forgot his lines, so he ad-libbed.
Examples:
"Heinicke ad-libbed a 30-yard touchdown pass to J.D. McKissic…, rallying the Washington Football Team to a 34-30 victory...." — ESPN, 3 Oct. 2021
Did you know?
Ad-lib is a shortening of Latin ad libitum, which means "in accordance with one's wishes." In the past, ad libitum was used to refer to any activity where the performer was free to do whatever they liked for as long as desired, whether the activity be drawing, working math problems, talking, playing music, or acting.