Midgard

in Germanic cosmology, "world inhabited by men (opposed to Asgard, the abode of the gods), 1882, from Old Norse miðgarðr, from mið "mid" (from PIE root *medhyo- "middle") + Proto-Germanic *gardoz "enclosure, tract" (from PIE root *gher- (1) "to grasp, enclose"). The Old English cognate was middangeard, which later was folk-etymologized as middle earth (late 13c.).