This is the 8994th most frequent Japanese word.
泊まる
To stay or lodge.
In this sentence, "泊まる" is used to indicate staying overnight at a specific place, which is the friend's house in this context.
今日は友達の家に泊まります。
Today, I will stay overnight at my friend's house.
Here, "泊まる" refers to staying at a hotel, commonly used for accommodations during travel.
旅行中はホテルに泊まる予定です。
During the trip, I plan to stay at a hotel.
In this example, "泊まる" expresses staying in a tent, depicting an outdoor and temporary form of residency.