(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]
(zhī, ㄓ) classifier for birds and certain animals, one of a pair, some utensils, vessels etc [CE-DICT]
是
(これ) (pn) (1) (uk) (See 何れ・1,其れ・1,彼・あれ・1) this (indicating an item near the speaker, the action of the speaker, or the current topic); (2) (hum) this person (usu. indicating someone in one's in-group); (3) now; (4) (arch) here; (5) (arch) I (me); (6) (arch) certainly; (P) [EDICT]