It is put at the start of another word to make a different meaning.
Form is the structure of a particular piece, how its parts are put together to make the whole.
They're hard put to it to make both ends meet.
I don't know how to put it to make you understand.
I've never been put in a position to make the decision.
The books might have been put together especially to make it difficult to find things out.
"I put a lot of pressure on myself to make this a better team."
"We think they put it there to make our life difficult."
We still have much to debate and to put in place to make this work.
Good job, now let's put the parts together to make a word.