to speak or perform without preparation
準備なしで話すまたは行動する (junbi nashi de hanasu matawa koudou suru)
"He gave an off the cuff remark that impressed everyone."
"彼は即興でコメントをして、みんなを感動させました。" (Kare wa sokkyou de komento wo shite, minna wo kandou sasemashita.)
unable to speak because of surprise or shock
to hear something but quickly forget it
exactly what is needed or wanted
to become well-known or famous for something
Any big task starts with a small action.
not tell anyone about something