noun, masculine/feminine/ˈmaɾ/plural: mares
mar is masculine or feminine depending on context in Spanish.
sea; seaside; lunar mare; loads; really; hella
“Cuba está ubicada en el mar Caribe.” — Cuba is located in the Caribbean sea.
Inherited from Old Spanish mar (“sea”), from Latin mare (“sea”), from Proto-Italic *mari, from Proto-Indo-European *móri.