air conditioning
empty, sky, void, vacant, vacuum
クウ / そら
spirit, mind, air, atmosphere, mood
キ / いき
tune, tone, meter, key (music), writing style, prepare, exorcise, investigate, harmonize, mediate
チョウ / しら.べる
organize, arranging, tune, tone, meter, key (music)
セイ / ととの.える