Where does “stigma” come from?

stigma (Czech) comes from Latin stigma, from Ancient Greek στίγμα, from Ancient Greek στίζω, from Proto-Hellenic stiďďō, from Proto-Indo-European (s)teyg- — to be sharp; to sting.

Ancestry of “stigma”, step by step

Step	Language	Word	Meaning
1	Latin	stigma	brand; medieval spelling of stemma
2	Ancient Greek	στίγμα	A mark from a pointed instrument, often as a sign...
3	Ancient Greek	στίζω	I tattoo; I mark
4	Proto-Hellenic	stiďďō	—
5	Proto-Indo-European	(s)teyg-	to be sharp; to sting

Every word from Proto-Indo-European (s)teyg- →Every word from Proto-Hellenic stiďďō →Every word from Ancient Greek στίζω →