瞳を閉じる

瞳孔

どうこう

pupil (of the eye)

瞳の色

ひとみのいろ

eye color

密閉の窟

みっぺいのくつ

sealed cave

閉鎖

へいさ

closing, closure

開閉

かいへい

opening and shutting, opening and closing

閉会

へいかい

closure (of a ceremony, event, meeting, etc.)

閉口

へいこう

to be stumped, to be at a loss

閉店

へいてん

closing up shop (for the day), stopping business