Where does “quiētus” come from?

quiētus (Latin) comes from Latin quiēscō, from Latin quiēs, from Proto-Italic kʷiētis, from Proto-Indo-European kʷyéh₁tis, from Proto-Indo-European kʷyeh₁- — to rest; rest, peace.

Ancestry of “quiētus”, step by step

Step	Language	Word	Meaning
1	Latin	quiēscō	—
2	Latin	quiēs	—
3	Proto-Italic	kʷiētis	—
4	Proto-Indo-European	kʷyéh₁tis	—
5	Proto-Indo-European	kʷyeh₁-	to rest; rest, peace

Every word from Proto-Indo-European kʷyeh₁- →

quiētus — Etymology, Origin & Word History | Etymology Explorer