Antonyms of adj airless

1 sense of airless

Sense 1
airless, close, stuffy, unaired -- (lacking fresh air; "a dusty airless attic"; "the dreadfully close atmosphere"; "hot and stuffy and the air was blue with smoke")

INDIRECT (VIA unventilated) -> ventilated -- (exposed to air; "a well ventilated room")

Similarity of adj airless

1 sense of airless

Sense 1
airless, close, stuffy, unaired -- (lacking fresh air; "a dusty airless attic"; "the dreadfully close atmosphere"; "hot and stuffy and the air was blue with smoke")
       => unventilated (vs. ventilated) -- (not ventilated; "stuffy unventilated rooms")