| monosyllabic forms |
| inn, in, it, ins |
| dissyllabic forms |
| innar, ina, inum, inni, inu, inir, inar, inna, inum |
| single-n dissylables |
| inir, inar, ina (apm), ina (asf), inum, inu |
| [noun ending] + [article] to drop i: | examples: |
| [short vowel] + [monosyllable] | boginn, bogans, konan, hjartat |
| [any vowel] + [dissyllable] | ánni, snænum, konunnar |
|
[consonant] + [single-n dissyllable]
(except asf) | víkingarnir, þarfarnar, fœtrna |
| dp: noun drops -m, article drops i | bǫrnum + inum > bǫrnunum |
| [noun ending] + [article] to retain i: | examples |
| [long vowel] + [monosyllable] | áin, páins, hræit |
| [consonant] + [monosyllable] | víkingrinn, þǫrfin, barnsins |
| [consonant] + ina (asf) | laugina, þǫrfina, bókina |
| [consonant] + [double-n dissyllable] | lauginnar, bókinni |