This is the 14260th most frequent Russian word.
остановился
"Stopped" or "came to a stop."
In this sentence, 'остановился' is used to mean 'stopped' in the context of pausing one's movement or journey.
Я остановился у магазина, чтобы купить воды.
I stopped by the store to buy some water.
Here, 'остановился' indicates 'stayed' with reference to selecting a place for temporary residence.
Он остановился в отеле недалеко от пляжа.
He stayed at a hotel near the beach.
The word 'остановившись' in this sentence is in its participle form, describing the act of stopping momentarily.