Question

"the trucks ground up and away heading out of it all " what is the meaning of this line?​

Answer 1

Answer:

This is rather hard to understand: it's not a standard use of 'grind'. I think it means that the trucks ground up the earth/soil (= crushed it), and then moved away, continuing to grind it. So even though this is Hemingway, it doesn't seem to be standard English. We need an object with 'grind up': you grind up coffee, you grind up rocks. And you definitely can't 'grind away', meaning some kind of motion that combines grinding and going away.