集中: to concentrate

暗中: the situation in the dark

(slang) going to or being graduated from the same middle school (中学校)

(onomatopoeia) whistling of the wind, a flute, or flying by of a ghost, etc.

角柱: prism

円柱: cylinder; column

爬虫: reptile

nights stayed, nights

box

a box: a container with a lid / (archaic) a chamber pot for feces; (by extension) feces