帰る is a ごだん (Type I) verb meaning to return or to go home. It is used for returning to a place where one belongs, such as home, one's hometown, or one's home country. It is distinct from 戻る, which refers to returning to a previous location more generally.
That is how Fuguro works. It brings 帰る back for review right before you forget it, each time a little later, until it sticks for good. You hear it spoken aloud, and you meet it again in stories you can already read. The first five levels are free.