"Brannmannen går inn i huset."

Translation: The firefighter is going into the house.

[ColePaulson]

Can someone help explain why the sentence needs both 'inn' and 'i'? My best guess is the verb for 'enter' is "gå inn" and "i huset" is an adverbial clause?

[alek_d]

"inn i" is a phrasal preposition indicating motion inward, similar to "into" in English, which when you think about it also consists of two parts "in" and "to".

[sdnyftz]

Would "Brannmannen går i huset" or "Brannmannen går inn huset" work as well/sound natural?

[Andy642820]

Inn is an adverb only and cannot be used as preposition. "i" only looks more like "walks in the house", not "entering the house"