(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]
(kòng, ㄎㄨㄥˋ) emptied; leisure [CE-DICT]
中
(じゅう;ぢゅう) (suf) (1) through; throughout; in the course of; (2) all over or throughout (e.g. a place) [EDICT]
(ちゅう) (suf) (1) (See 並・1) medium; average; middle; (2) moderation; (3) (abbr) (See 中一,中学校) middle school; (4) (abbr) (See 中国・1) China; (n-suf) (5) (See 中・じゅう・2) in; out of (e.g. three out of ten people); (6) (See 話し中) during (a certain time when one did or is doing something); under (construction, etc.); while; (P) [EDICT]
(yào, ㄧㄠˋ) important; vital; to want; to be going to; must [CE-DICT]
因
(いん) (n) (1) cause; factor; (2) {Buddh} (See 縁・えん・5) hetu (direct cause, esp. as opposed to indirect conditions); (3) (See 因明) the basis of one's argument (in hetuvidya); (P) [EDICT]