英和和英

to go between two parties―mediate between two parties―interpose between two parties―intervene between two parties―act as go-between―act as mediator

to crawl in

to go in

During the same period

to pierce something

go within

an inner room

Come in!

to enter a branch-road―diverge from one's course

Please come inside.

to enter a society―join a society―associate oneself with a society

get in between two people

to enter upon one's lucky period of life

go on strike

to join a party

to vigourously plunge inside

to carry something in one's arms and hold it close to one's chest

to join a club

There is an inner room.

Please let me in.

squeeze oneself in

move in an orbit

The rainy season sets in.

to enter a hole

to pull and draw into

to move into a flat and live there

to join

to get someone into one's group

to run into the jaws of death―put one's head into a lion's mouth

to be a master of the art