The term "cosmic air" can be interpreted in a variety of ways, but some possible antonyms include mundane, earthly, terrestrial, and grounded. These words suggest the opposite of cosmic, referring instead to things that are ordinary, commonplace, or locally-focused. Other antonyms might include small-scale, human-scale, or limited, underscoring contrasts in size or scope. Depending on the context, antonyms for "cosmic air" might also emphasize differences in atmosphere, mood, or tone. For example, antonyms like gloomy, oppressive, or stifling could be used to convey a sense of heaviness or constraint, whereas airy, light, or breezy might signal a more open, free-spirited vibe.