In English, the planet is named after Mars, the Roman god of war, an association made because of its red color, which suggests blood. The adjectival form of Latin Mars is Martius, from which the English word Martian derives, used as an adjective or for a putative inhabitant of Mars, and Martial, used as an adjective corresponding to Terrestrial for Earth. In Greek, the planet is known as Ἄρης Arēs, with the inflectional stem Ἄρε- Are-. That is because of the Greek equivalent to Mars is Ares. From this come technical terms such as areology, as well as the (rare) adjective Arean and the star name Antares.