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

width of the fold of eyelids with a fold (二重瞼)

splitting from one into two / (especially) taking the entry tests for two schools / (especially) dating two people at once

蓋: lid; cap; cover / 双: pair, set of two

負担: A burden, charge, responsibility; to bear a burden, charge, responsibility. / 布毯, 布単: A special cloth laid down to cover the path traveled by the procession during a shrine dedication or transfer.

two

two

box

be incidental to

secondary, incidental