Where does “ciumerniță” come from?

ciumerniță (Romanian) comes from Romanian ciumă, from Latin cȳma, from Ancient Greek κῦμα, from Proto-Hellenic kūmə, from Proto-Indo-European ḱúh₁mn̥, from Proto-Indo-European -mn̥ — Creates action nouns or result nouns from verbs.

ciumerniță (Romanian): thorn apple (Datura stramonium)

Definitions

thorn apple (Datura stramonium)

Ancestry of “ciumerniță”, step by step

Step	Language	Word	Meaning
1	Romanian	ciumă	plague, pest, pestilence
2	Latin	cȳma	young sprout or spring shoot of cabbage
3	Ancient Greek	κῦμα	swell, wave, billow; fetus, embryo
4	Proto-Hellenic	kūmə	swell, wave
5	Proto-Indo-European	ḱúh₁mn̥	—
6	Proto-Indo-European	-mn̥	Creates action nouns or result nouns from verbs

Every word from Proto-Indo-European -mn̥ →Every word from Proto-Indo-European ḱúh₁mn̥ →Every word from Proto-Hellenic kūmə →