Where does “Transnistria” come from?

Transnistria derives from Romanian, combining Latin trans with a Proto-Indo-European root terh₂- meaning to cross or traverse.

Ancestry of “Transnistria”, step by step

Step	Language	Word	Meaning
1	Romanian	Transnistria	—
2	Romanian	Nistru	Dniester
3	Old East Slavic	Дънѣстръ	—
4	Proto-Slavic	*Dъněstrъ	—