Where does “citāre” come from?

citāre (Latin) comes from Latin ciere, from Proto-Indo-European ḱey- — to be lying down; to settle.

Ancestry of “citāre”, step by step

Step	Language	Word	Meaning
1	Latin	ciere	second-person singular future passive indicative...
2	Proto-Indo-European	ḱey-	to be lying down; to settle