(prt) (arch) (See を) marks object of action, etc. (also adds emphasis)[edict]
空ける
うつける
(v1,vi) (1) to become empty (hollow); (2) to relax from a tense situation into a vacant or absent minded state[edict]
ます
(n) (1) measuring container; measure; (2) box (seating at a theatre, etc.); (3) square on a grid; cell of a grid; (4) (斗 only) square bearing block (at the top of a pillar); (P)[edict]