Where does “coma” come from?

coma (Old Portuguese) comes from Latin coma, from Ancient Greek κόμη, from Latin κομεω — to care for.

Ancestry of “coma”, step by step

Step	Language	Word	Meaning
1	Latin	coma	The hair of the head; foliage
2	Ancient Greek	κόμη	hair of the head
3	Latin	κομεω	to care for