ater [atra -um, atrior -or -us, aterrimus -a -um]adjective atrox [atrocis (gen.), atrocior -or -us, atrocissimus -a -um]adjective furvus [furva, furvum]adjective niger [nigra, nigrum]adjective nigrans [(gen.), nigrantis]adjective trux [(gen.), trucis]adjective | 