backtracker
nounUK /ˈbæk.træk.ər/
US /ˈbæk.træk.ɚ/
A backtracker is someone who goes back the same way they came.
The hiker was a careful backtracker and returned along the trail before dark.
OTHER MEANINGS
2. A person who changes an earlier opinion or statement.
The politician was called a backtracker after reversing his promise.
3. A program or method that searches backward through possible solutions.
The puzzle solver used a backtracker to try each option and undo wrong moves.
4. A person who follows an animal's tracks back to its hiding place.
The tracker was a skilled backtracker who found the fox's den.