Where does “cetățuică” come from?

cetățuică (Romanian) comes from Romanian cetate, from Late Latin civitas, from Latin cīvis, from Proto-Indo-European ḱey- — to be lying down; to settle.

Ancestry of “cetățuică”, step by step

Step	Language	Word	Meaning
1	Romanian	cetate	citadel; fortress
2	Late Latin	civitas	—
3	Latin	cīvis	citizen
4	Proto-Indo-European	ḱey-	to be lying down; to settle

Every word from Proto-Indo-European ḱey- →Every word from Latin cīvis →Every word from Late Latin civitas →