Where does “ἔμπλαστον” come from?

ἔμπλαστον (Ancient Greek) comes from Ancient Greek ἔμπλαστος, from Ancient Greek ἐμπλάσσω, from Ancient Greek ἐν-, from Ancient Greek ἐν, from Ancient Greek δέρμα, from Ancient Greek γλυφή, from Ancient Greek -ῐ́ᾱ, from Proto-Indo-European -íh₂ — Creates collective nouns, which refer to groups...

Ancestry of “ἔμπλαστον”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	ἔμπλαστος	daubed, plastered; daubed on
2	Ancient Greek	ἐμπλάσσω	daub on
3	Ancient Greek	ἐν-	in, within; on
4	Ancient Greek	ἐν	in, on, at; among; in, at, or during the time of
5	Ancient Greek	δέρμα	skin, hide
6	Ancient Greek	γλυφή	carving, carved work; hole cut
7	Ancient Greek	-ῐ́ᾱ	{{l\|en\|-ia}}; "suffix forming abstract feminine...
8	Proto-Indo-European	-íh₂	—
9	Proto-Indo-European	-h₂	Creates collective nouns, which refer to groups...

Every word from Proto-Indo-European -h₂ →Every word from Ancient Greek -ῐ́ᾱ →Every word from Ancient Greek ἐν- →