MURK is validvalid

dark [adj MURKER, MURKEST] : MURKLY [adv] / darkness [n MURKS]

3,627 of 196,601 in NWL2023·also valid in CSW24

dark, gloomy, obscure, also MIRK [adj MURKER, MURKEST, MURKLY] / to murder, defeat convincingly [v MURKED, MURKING, MURKS]