verb
persevere
per-suh-VEER/ˌpɜːrsəˈvɪr/
To keep trying despite difficulty, delay, or opposition.
The tired cyclist continues to persevere uphill through wind and rain.

Etymology
“Very” and “strict” originally expressed earnest firmness. The resulting verb meant to continue steadfastly, connecting that firmness of purpose with carrying on despite difficulty or discouragement.
In context
Then I come to the third type which is the most difficult. The most difficult to be patient and to persevere in the face of disobedience.
More examples
- The hikers persevered through rain and exhaustion.
- He learned to persevere when the first design failed.
- Their coach praised the team for persevering after a poor start.
Forms
persevere · perseveres · persevered · persevering
perseverance noun — continued effort despite difficulty