Where does “paroxysmus” come from?

paroxysmus (Latin) comes from Ancient Greek παροξυσμός, from Ancient Greek παροξύνω, from Ancient Greek πᾰρᾰ-, from Ancient Greek παρά, from Latin verēdus, from Gaulish werēdos, from Proto-Celtic *uɸoreidos — horse.

paroxysmus (Latin): paroxysm

Definitions

paroxysm

Ancestry of “paroxysmus”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	παροξυσμός	irritation, the severe fit of a disease
2	Ancient Greek	παροξύνω	to urge, prick, spur on, stimulate
3	Ancient Greek	πᾰρᾰ-	near; next to; by, near
4	Ancient Greek	παρά
5	Latin	verēdus	A fast or light breed of horse; courier's horse; hunter
6	Gaulish	werēdos	horse
7	Proto-Celtic	*uɸoreidos	horse

Every word from Proto-Celtic *uɸoreidos →Every word from Ancient Greek πᾰρᾰ- →Every word from Gaulish werēdos →