Square (one's) shoulders phrasal verb informal
Used to show willingness to overcome and solve difficulties and challenges and demonstrate courage or determination.
I know that you're nervous about the contest, but you just need to square your shoulders and try your best.
I always keep squaring my shoulders. I think I will become better and succeed because of challenges in my life.
Enthusiasm and perseverance
Said of a strong and courageous nature
To despise or make determined attempts less strong
To start working on something seriously or determinedly; to start doing what needs to be done
Used to say that someone is very courageous.
The verb "square" should be conjugated according to its tense.
She is a very brave person. Whatever the circumstances she squares her shoulders.
This phrase arises from 1819.