プログレッシブ和英中辞典(第4版)の解説
せいいっぱい【精一杯】
with all one's strength [might]; to the best of one's ability
精一杯働く
work as hard as possible [one can]
精一杯のことはやってみましょう
I will do my best.／《口》 I'll give it all I've got.
子供たちを食べさせるのが精一杯だった
It was all I could do to feed my children.
これが精一杯の譲歩です
This is the limit ― I can't compromise any further.／This is the most I can concede.