0 ability and determination when competing or doing something difficult: --
1 bravery and determination: --
I am on my mettle as regards my response to that observation.
The present incumbent of the post is not showing his mettle but is flannelling.
I have had talks with it and it is ready to prove its mettle.
Instead of being left, to lose hope, these worthy, decent citizens ought to have the chance to show their undoubted mettle.
The school children have also shown their mettle under fire.
They are on their mettle to show that they can handle the new delegated powers.
We had to prove our mettle in battle unfortunately.
They could and should have been allowed to prove their mettle.
