endeavor

• Leave no stone unturned

  To make every possible effort and investigate every possibility in order to achieve a goal or find something.

• Pull oneself up by one's bootstraps

  To improve one's situation or achieve success through one's own efforts, without relying on assistance from others.

• Dig deep

  To exert maximum effort and find hidden reserves of strength or courage, especially when facing a difficult challenge.

• A tough climb

  This phrase describes a challenging and difficult undertaking that requires significant effort, perseverance, and resilience to accomplish.

• A daunting challenge

  Something that is extremely difficult or intimidating to undertake.