This is the 147th most frequent Norwegian word.
fordi
"Because."
Here, 'fordi' is used to introduce the reason for the speaker's tardiness.
Jeg kom sent fordi jeg mistet bussen.
I arrived late because I missed the bus.
In this sentence, 'fordi' explains the cause of the happiness.
Han er glad fordi han fikk en gave.
He is happy because he received a present.
The word 'fordi' is utilized here to provide the reason for the action of going inside.