airy

adj

1.
open to or abounding in fresh air
aired
Derived from:
air airiness
2.
not practical or realizable; speculative
impractical Laputan visionary windy
3.
having little or no perceptible weight; so light as to resemble air
Derived from:
airiness
4.
characterized by lightness and insubstantiality; as impalpable or intangible as air
aerial aeriform aery ethereal
Derived from:
airiness