Where does “cosmos” come from?

cosmos (New Latin) comes from Ancient Greek κόσμος, from Ancient Greek θέσις, from Ancient Greek τίθημι, from Proto-Indo-European dʰeh₁- — to do, put, place.

Ancestry of “cosmos”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	κόσμος	order; lawful order, government; mode, fashion
2	Ancient Greek	θέσις	a setting, placement, arrangement; deposit;...
3	Ancient Greek	τίθημι	I put, place, set; I make, cause to be; I make
4	Proto-Indo-European	dʰeh₁-	to do, put, place

Every word from Proto-Indo-European dʰeh₁- →Every word from Ancient Greek τίθημι →Every word from Ancient Greek θέσις →