Formsmuturs(genitive, singular) · mutur(indefinite, nominative, singular) · mutrið(definite, nominative, singular) · mutur(accusative, indefinite, singular) · mutrið(accusative, definite, singular) · mutri(dative, indefinite, singular) · mutrinum(dative, definite, singular) · muturs(genitive, indefinite, singular) · mutursins(definite, genitive, singular)
Source: Wiktionary