Where does “inhiandus” come from?

inhiandus (Latin) comes from Latin inhio, from Latin hiō, from Proto-Italic hiāō, from Proto-Indo-European ǵʰh₁i-eh₂-, from Proto-Indo-European ǵʰeh₁y-, from Proto-Indo-European ǵʰih₁-.

Definitions

Ancestry of “inhiandus”, step by step

Step	Language	Word	Meaning
1	Latin	inhio	I gape, such as in amazement; I open my mouth...
2	Latin	hiō	to yawn, gape
3	Proto-Italic	hiāō	—
4	Proto-Indo-European	ǵʰh₁i-eh₂-	to gape, be wide open
5	Proto-Indo-European	ǵʰeh₁y-	to yawn, gape; to gape, be wide open; to gape,...
6	Proto-Indo-European	ǵʰih₁-	—

Every word from Proto-Indo-European ǵʰih₁- →Every word from Proto-Indo-European ǵʰeh₁y- →Every word from Proto-Indo-European ǵʰh₁i-eh₂- →