to knock somebody off one's feet
01
誰かを感動させる, 強く感動させる
to surprise or impress someone greatly
idiom
例
The singer's voice knocked me off my feet.
彼女の演技には完全に感動させられた。
02
完全に面食らわせる, 不意を突いて圧倒する
to overwhelm or defeat someone completely and unexpectedly
idiom
例
The financial crisis knocked many families off their feet, forcing them to sell their homes, cars, and other belongings.
格下の相手が第一ラウンドで王者を完全に面食らわせた。
