im·per·mis·si·ble 
/ɪmˌpɚˈmɪsəbəl/ adjective
/ɪmˌpɚˈmɪsəbəl/ adjective formal : not allowed or permitted : not permissible
▪ Such behavior is impermissible under the new guidelines. ▪ an impermissible breach of etiquette
▪ Such behavior is impermissible under the new guidelines. ▪ an impermissible breach of etiquette
— im·per·mis·si·bly /ɪmˌpɚˈmɪsəbli/ adverb
/ɪmˌpɚˈmɪsəbli/ adverb
