What is the Meaning of the Expression
to do something
WITH ALL ONE’S MIGHT?
use all your power or strength
Typically, this is used when all your strength was not enough. It is often followed by “but”.
1. He pulled with all his might, but he still couldn’t open the door.
2. We tried with all our might, but we had no success.
3. They pushed with all their might, but the old bookcase was so heavy they couldn’t move it.
Replace *one’s with an appropriate possessive adjective such as: my, your, his, her, our, or their.