This is the 115th most frequent Hungarian word.
belül
"Belül" means "inside" or "within" in English.
Here, 'belül' is used as an adverb indicating the interior of something.
A ház belül tágas és világos.
The house is spacious and bright inside.
In this sentence, 'belül' is used as a preposition to describe being within a spatial boundary.
Kérlek, maradj a kijelölt területen belül.
Please stay within the designated area.
Here, 'belül' is a temporal adverb meaning 'within a time period' to express a deadline.