() (pref) (1) very; totally; (2) (See 殿・どの) polite suffix used after a person's name (often of an apprentice; used much more broadly in southern Kyushu); (n,adv-to) (3) bang (e.g. of large drum, signal pistol, etc.); with a thud; sound when slamming something down [EDICT]
(くう) (n) (1) empty air; sky; (2) {Buddh} shunya (emptiness, the lack of an immutable intrinsic nature within any phemomenon); (3) (abbr) (See 空軍) air force; (n,adj-na) (4) fruitlessness; meaninglessness; (5) (See 五大・1) void (one of the five elements) [EDICT]
(そら) (n) sky; the heavens; (P) [EDICT]
(kōng, ㄎㄨㄥ) air; sky; empty; free time; in vain [CE-DICT]