This adjective comes from the Latin “ērumpĕre,” with “ē” meaning “out” and “rumpĕre” meaning “to burst forth.” “Erumpent” is used almost exclusively in a biological sense to talk about plants and fungi bursting through the ground or through a surface. For example, after a hard rain, mushrooms might be erumpent across your lawn, and you might be happy to see erumpent new sprouts in your vegetable garden.