afflicted
A word to put in front of 'on' to make a new word is up (upon).
A word with another word put in the middle is called a compound word or a portmanteau.
Another word for apply is put in place
to put on
Another word for "Put" would be "Place".
"Stress out"? That's not really much of a word, more of a phrase. "Stressing out" means when your put under too much pressure or stress than you can bare.
explain
insult
ambition
To impose, put upon; to establish.
no
The two women sang in unison upon the stage.