This is the 15155th most frequent Russian word.
полуостров
Peninsula.
Here, 'полуостров' is used as the subject of the sentence, referring to a geographical location.
Этот полуостров знаменіт своей живописной природой.
This peninsula is famous for its picturesque nature.
In this sentence, 'полуостров' is used as the object of the preposition 'по', indicating the area where the traveling occurred.
Мы путешествовали по полуострову весь день.
We traveled around the peninsula all day.
Here, 'полуостров' is used as the object of the verb 'решили исследовать', describing the geographical region to be explored.