"Are in midair" implies that an object or a creature is suspended in the air. The antonyms for this phrase include "on the ground," "underwater," "buried," and "submerged." When an object is on the ground, it means that it is firmly located on the earth's surface. Underwater means that the object is submerged below the surface of a body of water. Buried means that something is covered with soil or other materials. Submerged describes something that is completely immersed in a liquid or gas. Antonyms for "are in midair" illustrate the many possible locations of an object or creature, all of which offer a different perspective and set of challenges.