Possessive adjectives
Possessive adjectives are formed from the genitive of the possessor by adding the suffix - r, - ra, - ró.
puk (boy) > puka > pukar (of the boy)
puci (boys) > pukú > pukúr (of the boys)
pučke (girls) > puček > pučkr (of the girls)
The same procedure applies for pronouns:
jaš (I) > ne > ner (my)
The possesive adjectives inflect as usual adjectives.
Šelčem pocalkeré čiľi. I live in my sister's house.
Should the possesor be enhanced with further adjectives/specifiers, the additional adjective is put into genitive with the suffix -sko (after vowels) or -jjko (after consonants). These suffixes are independent from gender, number or demonstrativness. The form doesn't inflect any further.
duňá pučka (big girl) > duňé pučke > duňésko pučkerí (of the big girl)
žiní puci (small boys) > žiníh pukú > žiníško pukúrí (of the small boys)
Šelčem nerésko pocalkeré čiľi. I live in the house of my sister.
Prepositional possessive
The bare genitive is never used to express possession in Islandish, but there is a prepositional construction equivalent to the English "of":
v (from) + genitive
It is used mainly in situations, where the use of possesive pronouns would be to combersome:
Eg.
Vém baš posečku v hajstvitníh oľiček. Here I have a list of buildings which should be torn down.
With possessive adjectives: Vém baš hajstvitníško oľičekrú posečku.