Where does “Medousa” come from?

Medousa (English) comes from Ancient Greek μέδουσα, from Ancient Greek μέδω, from Proto-Indo-European mēd-, from Proto-Indo-European med- — to measure; to give advice; healing.

Ancestry of “Medousa”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	μέδουσα	Medusa
2	Ancient Greek	μέδω	to protect, rule over
3	Proto-Indo-European	mēd-	to measure
4	Proto-Indo-European	med-	to measure; to give advice; healing

Every word from Proto-Indo-European med- →Every word from Proto-Indo-European mēd- →Every word from Ancient Greek μέδω →