deregister/diːˈɹɛdʒɪstə(ɹ)/EtymologyFrom de- + register.deregister means to unregister. Lexicurio rates it Sui generis — a strength score of 87 out of 100.deregister is pronounced /diːˈɹɛdʒɪstə(ɹ)/.verbto unregisterto unsubscribe