Learn English – “The purpose of” versus “the purpose for” — which one is proper

grammaticalityprepositionsword-choice

Is there even a difference between the two?

Best Answer

My thought is that "purpose of" refers to an intended function of an item. "Purpose for" refers to how an item will be used, regardless of that use's relation to the item's intended function.

Hmm. I'm not describing that well. How about this:

The "purpose of" a shoe is protecting your feet. A possible "purpose for" a shoe is to smash bugs.

So "purpose of" describes a property or capacity of a shoe, where "purpose for" describes what might be done with a shoe.