Where does “păducherniță” come from?

păducherniță (Romanian) comes from Romanian păduche, from Romanian păduchi, from Late Latin peduclus, from Latin peduculus, from Latin pedīculus, from Latin pēdis, from Latin pēs, from Ancient Greek μέτρον — Derives agent nouns from verbs, denoting someone...

păducherniță (Romanian): stinking pepperweed (Lepidium ruderale)

Definitions

stinking pepperweed (Lepidium ruderale)

Ancestry of “păducherniță”, step by step

Step	Language	Word	Meaning
1	Romanian	păduche	louse
2	Romanian	păduchi	plural of păduche
3	Late Latin	peduclus	Alternative form of pēduculus
4	Latin	peduculus	Alternative form of pēdiculus; louse
5	Latin	pedīculus	A little foot
6	Latin	pēdis	louse
7	Latin	pēs	a foot, in its senses as
8	Ancient Greek	μέτρον	something used to measure: measure, rule, weight;...
9	Ancient Greek	-τρον	Forms instrument nouns
10	Proto-Hellenic	-tron	Forms instrument nouns from verb stems
11	Proto-Indo-European	-trom	Forms nouns denoting a tool or instrument
12	Proto-Indo-European	-tḗr	Derives agent nouns from verbs, denoting someone...

Every word from Proto-Indo-European -tḗr →Every word from Ancient Greek -τρον →Every word from Ancient Greek μέτρον →