Where does “-γνωσία” come from?

-γνωσία (Ancient Greek) comes from Ancient Greek γνῶσις, from Proto-Indo-European ǵneh₃- — to know.

Ancestry of “-γνωσία”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	γνῶσις	inquiry; knowledge; fame
2	Proto-Indo-European	ǵneh₃-	to know