inward

As Earth's metallic core formed, elements such as iron and molybdenum migrated inward and became concentrated there, leaving the mantle with much lower amounts.

Under normal conditions, this region stretches far from Earth, but the May storm forced its outer edge inward from about 44,000 km above the surface to only 9,600 km.

The Roman poet Prudentius took the struggle inward, into “the cave of the breast.”

The statues are placed in different directions, equidistant from one another, and facing inward toward the center of the office.

Throughout its life, a star keeps a stable spherical shape because gravity pulls inward while pressure from nuclear fusion pushes outward.