Wiktionary
nonenforceable
a. (context legal or rare English) Not enforceable; not able to be enforced; unenforcible.
Usage examples of "nonenforceable".
God damn it, I've just learned you thought it best to stupidly interfere in political and trade matters by trying to barter a nonenforceable agreement with the pretender to the Struan throne and so alienate the true head forever more!