Impossible.
The verb of the word done is do. As in "to do something".
Impossible
The negative word for possible is usually "impossible," meaning that something cannot be done or achieved under any circumstances.
something that cannot be avoided = inevitable
An impossibility
A word for something done yearly is annual.
The word means "unprofitable, unfruitful, and ineffective" or something which in the changed circumstances cannot be done or achieved.
Irreversibility. Also, something which, once done, cannot be changed, is irrevocable.
super impossible is something that cannot be done.
finished is a good word to use when you are done with something through, as in I'm through with you, it, that,them etc,etc,etc.
The negative adverb "cannot" and it's contraction "can't" are used to indicate an action not able to be done. The separate words "can not" are never used together in this usage. (also, if something is merely not allowed, "may not" is used instead)
The word "accuse" means "to charge a person with a crime or claim that a person has done something wrong". If you accuse someone of something, you are implicating that they have done something wrong.