riissas is the singular locative or singular locative of riisa.

riisaN

Finnish

(mitta)riisiN

Nordsamisk-finsk ordbokdict-sme-fin/src/n_smefin.xml:261015Edit on GitHub Suggest

riisitautiN

Nordsamisk-finsk ordbokdict-sme-fin/src/n_smefin.xml:261029Edit on GitHub Suggest

rijssaN

North Sámi – Lule Sámidict-sme-smj/src/all_smesmj.xml:43502Edit on GitHub Suggest