() (prt) (arch) (See を) marks object of action, etc. (also adds emphasis) [EDICT]
開く
(ひらく) (v5k,vt) (1) to open (e.g. a bank-account, festival, etc.); (v5k,vi) (2) to spread out; to open up (flower bud, umbrella, etc.); to widen (gap, distance, width); (3) to hold; to give (party, conference, etc.); (P) [EDICT]
(あく) (v5k,vi) (1) (esp. 開く) to open (e.g. doors); (2) (esp. 開く) to open (e.g. business, etc.); (3) (esp. 空く) to be empty; (4) (esp. 空く) to be vacant; to be available; to be free; (5) (esp. 明く) to be open (e.g. neckline, etc.); (6) (esp. 明く) to have been opened (of one's eyes, mouth, etc.); (7) (esp. 明く) to come to an end; (v5k,vt) (8) (esp. 明く) to open (one's eyes, mouth, etc.); (v5k,vi) (9) (See 穴が開く) to have a hole; to form a gap; to have an interval (between events); (P) [EDICT]
く
(句) (n,n-suf) (1) section (i.e. of text); sentence; passage; paragraph; (2) {ling} phrase; (3) verse (of 5 or 7 mora in Japanese poetry; of 4, 5, or 7 characters in Chinese poetry); (4) haiku; first 17 morae of a renga, etc.; (5) maxim; saying; idiom; expression; (P) [EDICT]