I've seen several threads about the prefix "a" and its various uses. Can we simply add this prefix to change the meaning of words to mean "not"? ie. asymmetrical, apolitical etc. As long as the word does not have origin in another language, we should be able to "make up" new words to have this "not" meaning. I'm trying to think of words to add this to, and the only one I can think of right now would be "perfect". This would be (pun intended) the perfect use of this prefix to mean "not". Aperfect
I would not try to form compound words of your own as word formation is not systematic. There are too many possibilities with word elements from various languages and formations from different times. The only thing you can do is to try to understand the meaning of the various morphemes (elements of word formation). But it is no use trying to make one's own compound words.