Where does “কোৰোক” come from?

কোৰোক (Assamese) comes from Assamese কোৰ, from Sanskrit *कोरति.

Ancestry of “কোৰোক”, step by step

Step	Language	Word	Meaning
1	Assamese	কোৰ	—
2	Sanskrit	*कोरति	—

কোৰোক — Etymology, Origin & Word History | Etymology Explorer