sumardagur
nafnorð karlkyn
Beyging
eintalafleirtala
án greinismeð greinián greinismeð greini
nf.sumardagursumardagurinnnf.sumardagarsumardagarnir
þf.sumardagsumardaginnþf.sumardagasumardagana
þgf.sumardegisumardeginumþgf.sumardögumsumardögunum
ef.sumardagssumardagsinsef.sumardagasumardaganna