This is the 4810th most frequent Japanese word.
泊まっ
"泊まっ" is the stem form of the verb "泊まる," meaning "to stay" or "to lodge."
In this sentence, "泊まりました" refers to spending the night at someone else's place.
昨日は友人の家に泊まりました。
I stayed at my friend's house yesterday.
Here, "泊まり" expresses the intention to stay overnight at a hotel during travel.
次の旅行では高級ホテルに泊まりたいです。
I want to stay at a luxury hotel for the next trip.
In this context, "泊まる" asks if it's possible to spend the night in a particular location, specifically on a ship.