Where does “Vicipéid” come from?

Vicipéid (Irish) comes from Irish ciclipéid, from Latin encyclopædia, from Ancient Greek ἐγκύκλιος παιδείᾱ, from Ancient Greek ἐγκύκλιος, from Ancient Greek ἐν-, from Ancient Greek ἐν, from Ancient Greek δέρμα, from Ancient Greek γλυφή — Creates collective nouns, which refer to groups...

Ancestry of “Vicipéid”, step by step

Step	Language	Word	Meaning
1	Irish	ciclipéid	encyclopedia
2	Latin	encyclopædia	—
3	Ancient Greek	ἐγκύκλιος παιδείᾱ	education in the circle of arts and sciences
4	Ancient Greek	ἐγκύκλιος	circular
5	Ancient Greek	ἐν-	in, within; on
6	Ancient Greek	ἐν	in, on, at; among; in, at, or during the time of
7	Ancient Greek	δέρμα	skin, hide
8	Ancient Greek	γλυφή	carving, carved work; hole cut
9	Ancient Greek	-ῐ́ᾱ	{{l\|en\|-ia}}; "suffix forming abstract feminine...
10	Proto-Indo-European	-íh₂	—
11	Proto-Indo-European	-h₂	Creates collective nouns, which refer to groups...

Every word from Proto-Indo-European -h₂ →