Come hell or high water

Meaning

This means you are committed to doing something no matter what obstacles stand in your way. It signifies absolute determination in the face of adversity.

Resolute, defiant

Used in a sentence

• I will get this project finished by Friday come hell or high water.
• We are going to make it to that wedding come hell or high water.
• I promised the kids a beach trip, and I am taking them come hell or high water.