最速

さいそく【最速】

～の fastest.

●世界最速の鉄道 the fastest train in the world

・その投手は自己最速の 157 キロを記録している. That pitcher has recorded a personal best speed of 157 kilometers an hour.

●彼女の重役昇進は同期の中で最速だ. She has been promoted to director faster than any of her contemporaries.