WordharðneskjulegurMeaninggruelingPart of speechadjectivePronunciationCourseIcelandicLessonBroad temporal periods (um)Usages of harðneskjulegurHundasleðakeppnin er harðneskjuleg um veturinn.The dog sled race is grueling during the winter.Mér skilst að svefnleysið sé harðneskjulegt um nóttina.I understand that the sleep deprivation is grueling during the night.