Where does “gravatif” come from?

gravatif (French) comes from French gravé, from Middle French grave, from Old French gravé, from Medieval Latin grava, from Gaulish grawa, from Proto-Celtic grāwā, from Proto-Indo-European gʰroh₁weh₂, from Proto-Indo-European gʰreh₁w- — to grind.

gravatif (French): heavy; accompanied by a sense of weight