silica gel

enter

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

to go in; to come in / 要る: to be necessary, to be required

to enter, go into, get into a place or a thing / to join a group or organization / to be contained (in), to be included (in) / to be a member of a group, set, category

box

to obtain, to come into possession, to become available

to be proficient, skilled, experienced

ashamed and unable to show one's face

"to enter the head": for learning to stay in one's head