Where does “хуеть” come from?

хуеть (Russian) comes from Russian хуй, from Proto-Slavic xujь, from Proto-Balto-Slavic kšaujás, from Proto-Indo-European skowyo.

Ancestry of “хуеть”, step by step

Step	Language	Word	Meaning
1	Russian	хуй	cock, dick, prick; fuck all, nothing; nobody
2	Proto-Slavic	xujь	penis
3	Proto-Balto-Slavic	kšaujás	—
4	Proto-Indo-European	skowyo	—

хуеть — Etymology, Origin & Word History | Etymology Explorer