verb (used with object), en·forced, en·forc·ing.
Origin of enforce
Examples from the Web for unenforceable
It is generally held to be unenforceable if the insured suicided while insane.
But other kinds of illegal contracts are not so obviously wicked as to make it clear that they are unenforceable.
The Statute of Frauds does not invalidate a verbal guarantee, but renders it unenforceable by action.
Hence, an agreement to sell goods is unenforceable if not supported by consideration.
Thus, a son worked for his father on his father's farm under an unenforceable contract with his uncle.Putnam's Handy Law Book for the Layman|Albert Sidney Bolles