空いた

あいた【開いた･空いた】

1 〔開(_ひら)いた〕 open; opened.

●あんまりばかばかしくて開いた口がふさがらなかった. It was so ridiculous that I was lost for words [I stood there in open-mouthed astonishment, I was completely taken aback, it left me dumbstruck].

2 〔空の〕 empty 《boxes》; vacant 《seats》; unoccupied 《houses》; 〔使われていない〕 unused 《rooms》; 《文》 disengaged 《personnel》.