This is the 5th most frequent Dutch word.
op
"Op" means "on" or "up" in English, depending on context.
In this context, 'op' means 'finished' or 'consumed completely,' indicating that there is no more left.
De koek is op.
The cookie is finished.
Here, 'op' is part of the separable verb 'opstaan,' meaning 'to get up,' representing the action of rising or awakening.
Ik sta elke dag om zeven uur op.
I get up every day at seven o'clock.
Here, 'op' is used as a preposition indicating location, specifically 'on' or 'onto' a surface.