level best
Noun
Meaning
the greatest possible degree
Source: WordNetSynonyms
Antonyms
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Examples
The man who has done his level best... is a success, even though the world may write him down a failure.
There is only one thing for us to do, and that is to do our level best right where we are every day of our lives; To use our best judgment, and then to trust the rest to that Power which holds the forces of the universe in his hands.
We should always choose our books as God chooses our friends, just a bit beyond us, so that we have to do our level best to keep up with them.
I have also noticed that when a rider who had confidence in his ability was defeated, after doing his level best to win, always received an ovation from the gathering.
We need to work our level best in this legislative session to help grow Montana's economy, so that grandchildren can stay in Montana, grandchildren can visit their grandmother and grandfather by driving across town, not flying across the country.
I've never been someone who's been given work because of the way I look or because I have some box office appeal. I get work because people know I'm swinging as hard as I can, trying to connect, giving it my level best. I have a face for radio, but here I am doing what I do.