retrace
verb [ T ] uk/rɪˈtreɪs/ us/rɪˈtreɪs/
沿原路返回;回忆;追溯
to go back over something, for example a path or a series of past actions
When he realized he had lost his keys, he retraced in his mind his movements that day. 他发现钥匙丢了，就把那天自己的一举一动都在脑子里过了一遍。
Idiom
retrace your stepsidiom C2 原路返回，折返
to go back to a place in the same way that you came
She walked straight past her office and then had to retrace her steps. 她径直走过自己的办公室，之后又不得不折返回来。