The phrase 'being in air' generally refers to a state or sensation of being suspended or lifted off the ground. The antonyms for this phrase would then revolve around the opposite feelings, or conditions, that are associated with being on solid ground, such as 'being on the ground,' 'standing firmly,' 'grounded,' 'rooted,' 'stationary,' 'planted firmly,' 'firmly established,' 'finished,' or 'concluded.' These words depict stability, balance, and normalcy, which counteract the notion of being up in the air or suspended in time or space. In summary, using antonyms for 'being in air' can help to provide a clearer picture of its exact meaning and can provide a more dynamic context.