The word "airlike" refers to something that resembles air in its qualities or properties. Therefore, antonyms for this word would be anything that is opposite to air, such as solid, liquid, dense, heavy, opaque, and earthy. These antonyms describe things that are physical, tangible and less formless than air, hence completely different. For example, an object that is heavy would be the antonym of something that is "airlike" as it is not light or weightless. In contrast, "earthly" would suggest something that is grounded, stable, and not free-flowing. Overall, antonyms for "airlike" would focus on the qualities that air lacks in order to describe the opposite of it.