square on

back to square one

Located back at the start, as after a dead end or failure.

square away

To finish, complete, tidy or put in order.

square meal

A (nutritionally) complete and satisfying meal, especially one suitable for a person performing physical labour.

square one

The place where one begins; a lack of progress.

square peg in a round hole

Someone or something that does not fit well or at all in a certain setting; a misfit; hence, someone or something that will not succeed in an endeavour, except possibly with much effort and force.

square shooter

A person who is fair, trustworthy, or forthright; a person who bargains or transacts business in a fair, honest manner.