This is the 7664th most frequent Russian word.
заблудившийся
"Lost" or "strayed."
Here, 'заблудившийся' is used as an adjective derived from the verb 'заблудиться', meaning 'to get lost'. It describes the tourist who has lost their way.
Заблудившийся турист искал дорогу к отелю.
The lost tourist was looking for the way to the hotel.
In this sentence, 'заблудившийся' is a participle acting as part of a descriptive phrase ('заблудившийся в лесу') providing context about someone who got lost in the forest.
Человек, заблудившийся в лесу, попытался позвонить на помощь.
The person lost in the forest tried to call for help.
Here, 'заблудившиеся' functions as an independent adjective modifying 'овцы' (sheep), describing them as lost.