This is the 223rd most frequent Danish word.
ekstra
"Extra" or "additional."
In this sentence, 'ekstra' functions as an adjective emphasizing something supplementary.
De tilbød mig en ekstra kop kaffe.
They offered me an extra cup of coffee.
Here, 'ekstra' is used as an adjective meaning 'additional' or 'more than usual'.
Jeg har brug for ekstra tid til at afslutte projektet.
I need extra time to finish the project.
'Ekstra' here is used as an adverb to intensify the degree of the action, meaning 'more than usual' or 'with greater effort'.