unenforceable
/ˌʌnɪnˈfɔrsəbəl/
adjective
- Not able to be made effective or obeyed; impossible to enforce.
- Many parking rules in that lot are unenforceable due to unclear signs.
- The old law was deemed unenforceable because it violated modern rights.
- The contract became unenforceable after the company went bankrupt.
Antonyms