Where does “главоболие” come from?

главоболие (Bulgarian) comes from Bulgarian бол, from Greek μπόλι, from Ancient Greek ἐμβόλιον, from Ancient Greek ἔμβολος, from Ancient Greek ἐμβάλλω, from Ancient Greek ἐν-, from Ancient Greek ἐν, from Ancient Greek δέρμα — Creates collective nouns, which refer to groups...

главоболие (Bulgarian): headache, cephalagia, encephalagia; trouble,...

Definitions

headache, cephalagia, encephalagia; trouble,...

Ancestry of “главоболие”, step by step

Step	Language	Word	Meaning
1	Bulgarian	бол	pain, ache; sick person; much
2	Greek	μπόλι	graft; vaccine
3	Ancient Greek	ἐμβόλιον	—
4	Ancient Greek	ἔμβολος	A peg, stopper; linchpin
5	Ancient Greek	ἐμβάλλω	to throw in, cast in; to put into; to bring
6	Ancient Greek	ἐν-	in, within; on
7	Ancient Greek	ἐν	in, on, at; among; in, at, or during the time of
8	Ancient Greek	δέρμα	skin, hide
9	Ancient Greek	γλυφή	carving, carved work; hole cut
10	Ancient Greek	-ῐ́ᾱ	{{l\|en\|-ia}}; "suffix forming abstract feminine...
11	Proto-Indo-European	-íh₂	—
12	Proto-Indo-European	-h₂	Creates collective nouns, which refer to groups...

Every word from Proto-Indo-European -h₂ →

главоболие — Etymology, Origin & Word History | Etymology Explorer