戻る.
帰ること
へ帰ってくる
to go backward―turn back―(退歩するの意味なら)―move backwards―retrograde―retrogress―(病人なら)―have a relapse
帰ろう
Let's go back.
to return to the former state―(旧にかえって悪くなれば)―relapse into the former state
return to your native land
Let's get back to the main topic.