The antonyms for the phrase "being in mid-air" could be "grounded", "stationary", or "fixed". When something is "grounded", it means it is on the ground or firmly attached to a surface. "Stationary" means not moving or still. Something that is "fixed" is attached or secure in place. These antonyms denote a lack of movement or displacement, signaling stability and control. On the other hand, the term "being in mid-air" suggests an object or a person is suspended, without the support of a surface. These antonyms offer an alternative perspective that signifies stability and firmness, highlighting the importance of being grounded and secure in our position.