Where does “Collura” come from?

Collura (Italian) comes from Sicilian Cuḍḍura, from Ancient Greek κολλύρα, from Ancient Greek κολλύριον, from Ancient Greek -ῐον, from Proto-Indo-European -yós — Creates adjectives from noun or verb stems.

Ancestry of “Collura”, step by step

Step	Language	Word	Meaning
1	Sicilian	Cuḍḍura	ring shaped bread
2	Ancient Greek	κολλύρα	roll or loaf of bread
3	Ancient Greek	κολλύριον	pessary, diaphragm; eyesalve, collyrium; fine...
4	Ancient Greek	-ῐον	diminutive suffix; "suffix forming...
5	Proto-Indo-European	-yós	Creates adjectives from noun or verb stems

Every word from Proto-Indo-European -yós →Every word from Ancient Greek -ῐον →Every word from Ancient Greek κολλύριον →