プログレッシブ和英中辞典(第4版)の解説
やすうけあい【安請け合い】
１週間で残りの仕事を仕上げると安請け合いしたがついにできなかった
I promised 「too readily [rashly] to finish the work in a week, but I wasn't able to do it.
できもしないことを安請け合いするのはよせ
Think twice before you agree to take on something that is beyond your power.／Don't agree so hastily [easily] to undertake something beyond your power.