what is meaning of grind
I will grind it to I succeed.
The only thing I grind is my workload.
What does these 2 grind mean here that I know it’s not crush.😂

Question

Answer

I will grind it until I succeed means that you will push yourself to attain success.  To grind out a workload imeans you are really working hard to get your workload completed

Answer

In this case "grind" means to work really hard to achieve a goal.