General remarks on declensionDon't fear declensions in Old Norse. Their bark is louderthan their bite. There's a pattern. Always see the pattern. I point out some of the symmetry explicitly but you shouldtry to find more yourself. It will ease the work on your memorygreatly and increase your understanding of the language as well. The dative plural of all nouns ends with um. The genitive plural of all nouns ends with a. Some of themof them end with na. There's a thick connection between the strong declension of nouns and thedefinite declension of adjectives. Always see the pattern.