Word family noun permission permit permissiveness adjective permissible ≠ impermissible permissive verb permit
From Longman Dictionary of Contemporary Englishimpermissibleim‧per‧mis‧si‧ble /ˌɪmpɜːˈmɪsəbəl $ -ɜːr-/ adjective formal LET/ALLOWsomething that is impermissible cannot be allowed OPP permissibleExamples from the Corpus
impermissible• The conduct of the officers in this case was impermissible.• I consider that such doctrine would be dangerous and impermissible.• To switch off the respirator otherwise is impermissible.• Codes of conduct were beginning to emerge and a range of permissible and impermissible subjects was being informally drawn up. 