This is the 3369th most frequent Dutch word.
kopje
"Small cup."
Here, 'kopje' refers to the diminutive form of 'kop', meaning 'cup', indicating a small cup used for drinking tea or coffee.
Ik drink een kopje thee in de ochtend.
I drink a cup of tea in the morning.
In this usage, 'kopje' refers to a small cup, indicating the literal object, showing interaction in the scene.
Het katje speelt met een kopje onder de tafel.
The kitten plays with a small cup under the table.
In this sentence, 'kopje' abstractly refers to a small measurement unit, commonly used in informal context to mean a small unspecified quantity, in this case, of sugar.