Where does “Lichoś” come from?

Lichoś (Polish) comes from Polish lichy, from Proto-Slavic lixъ, from Proto-Indo-European leykʷ- — to leave.

Ancestry of “Lichoś”, step by step

Step	Language	Word	Meaning
1	Polish	lichy	shoddy, poor; paltry; flimsy
2	Proto-Slavic	lixъ	remaining, unnecessary, superfluous, bad
3	Proto-Indo-European	leykʷ-	to leave

Lichoś — Etymology, Origin & Word History | Etymology Explorer