Where does “θετός” come from?

θετός (Greek) comes from Ancient Greek θετός, from Ancient Greek τίθημι, from Proto-Indo-European dʰeh₁- — to do, put, place.

θετός (Greek): adopted

Definitions

Step	Language	Word	Meaning
1	Ancient Greek	θετός	placed, put, settled; adopted; adoptive
2	Ancient Greek	τίθημι	I put, place, set; I make, cause to be; I make
3	Proto-Indo-European	dʰeh₁-	to do, put, place