Where does “chauve-souris de mer” come from?

chauve-souris de mer (French) comes from French mer, from Middle French mer, from Old French mer, from Latin mare, from Proto-Italic mari, from Proto-Indo-European móri, from Proto-Indo-European mer- — to die; to disappear; sea, lake, wetland.

Ancestry of “chauve-souris de mer”, step by step

chauve-souris de mer traces back through two separate lines of ancestry.

via French mer

StepLanguageWordMeaning
1Frenchmersea
2Middle Frenchmersea
3Old Frenchmersea
4Latinmaresea; ablative singular of mās
5Proto-Italicmarisea
6Proto-Indo-Europeanmórisea; standing water
7Proto-Indo-Europeanmer-to die; to disappear; sea, lake, wetland

via French chauve-souris

StepLanguageWordMeaning
1Frenchchauve-sourisbat
Every word from Proto-Indo-European mer-