Where does “urtīcāria” come from?

urtīcāria (New Latin) comes from Latin urtīca, from Latin -āria, from Latin -ārius, from Proto-Italic *-āzios.

Ancestry of “urtīcāria”, step by step

Step	Language	Word	Meaning
1	Latin	urtīca	—
2	Latin	-āria	—
3	Latin	-ārius	—
4	Proto-Italic	*-āzios	—

urtīcāria — Etymology, Origin & Word History | Etymology Explorer