プログレッシブ和英中辞典(第4版)の解説
いのちがけ【命掛け・命懸け】
命掛けで働く
work as though one's life depended on it／put everything one has into one's work
命懸けで急流を渡った
He crossed the rapid stream at the risk of his life.
その企ては命掛けだ
The attempt involves a grave risk.
命掛けの問題
a matter of life and death