Where does “стерна” come from?

стерна (Macedonian) comes from Greek στέρνα, from Greek κιστέρνα, from Latin cisterna, from Latin cista, from Ancient Greek κύστις, from Proto-Indo-European (s)kewH- — to cover, bedeck; cover.

стерна (Macedonian): cistern, water reservoir

Definitions

cistern, water reservoir

Ancestry of “стерна”, step by step

Step	Language	Word	Meaning
1	Greek	στέρνα	water cistern, tank, reservoir; tern; Nominative,...
2	Greek	κιστέρνα	—
3	Latin	cisterna	cistern, tank (for water), reservoir
4	Latin	cista	a trunk, a chest, a casket; vocative singular of...
5	Ancient Greek	κύστις	bladder
6	Proto-Indo-European	(s)kewH-	to cover, bedeck; cover

Every word from Proto-Indo-European (s)kewH- →Every word from Ancient Greek κύστις →Every word from Latin cista →