level best

慣用表現

(idiomatic) The very best that one can do

日本語の意味

その人が出せる最高の結果、すなわち全力での努力や成果 / 限られた能力の範囲内で、可能な限りの最善を尽くす結果

She gave her level best during the competition, but still missed first place.

彼女は大会で精一杯頑張ったが、それでも一位を逃した。

意味（1）

(idiomatic) The very best that one can do

--Say papa, baby. Say pa pa pa pa pa pa pa.

And baby did his level best to say it for he was very intelligent for eleven months everyone said and big for his age and the picture of health

level bests

（ plural ）