Where does “psoriasi” come from?

psoriasi (Catalan) comes from Late Latin psōriasis, from Ancient Greek ψωρίασις, from Ancient Greek -σῐς, from Ancient Greek -τις, from Proto-Indo-European -tis — Derives abstract/action nouns from verb roots.

psoriasi (Catalan): psoriasis

Definitions

psoriasis

Ancestry of “psoriasi”, step by step

Step	Language	Word	Meaning
1	Late Latin	psōriasis	—
2	Ancient Greek	ψωρίασις	itch; scabies; mange
3	Ancient Greek	-σῐς	"suffix forming nouns"
4	Ancient Greek	-τις	retained after dentals
5	Proto-Indo-European	-tis	Derives abstract/action nouns from verb roots

Every word from Proto-Indo-European -tis →Every word from Ancient Greek -σῐς →Every word from Ancient Greek -τις →