The phrase "being air" could refer to something or someone being light, weightless, or flowing. Synonyms for "being air" include ethereal, delicate, wispy, buoyant, and insubstantial. It could also imply something being intangible or abstract, such as fleeting, ephemeral, or intangible. In a more negative sense, "being air" could imply emptiness or lack of substance, so synonyms could include superficial, shallow, or inconsequential. Ultimately, the context in which "being air" is used will determine which synonym is most appropriate. Whether it's describing an object or a person, there are plenty of synonyms available to capture the essence of "being air".