プログレッシブ和英中辞典(第4版)の解説
ふみだい【踏み台】
&fRoman1;〔足台〕a stool;〔脚立〕a stepladder
踏み台に乗る
climb [get] up on a stool
&fRoman2;〔手段〕
同僚を踏み台にして出世をはかった
He made his colleague a steppingstone toward his own promotion./He tried to achieve distinction at the expense of his colleague.