There are a number of preposition words that change the meaning of a phrase when used with a particular word. For example, you can use Laugh with different prepositions, and you will get a different meaning every time. You can see the examples below:
1. Laugh at
Laugh at (make fun)
Example:We must not laugh at our friends.
2. Laugh with
Laugh with (indulge with)
Example: Better to laugh with disabled than to laugh at disabled.