godan verb (iku/yuku class)
go back; return (away from speaker)
Emphasizes movement away from the speaker or current location back to a previous place. The 行く part indicates going away, contrasting with 戻って来る (come back).
彼は自分の席に戻って行った。
He went back to his seat.
鳥が巣に戻
I saw the bird going back to its nest.