This is the 7632nd most frequent Dutch word.
controleerden
"Controleerden" means "checked" or "inspected" in English.
The word 'controleerden' is used here in the past tense to indicate that the researchers were engaged in the act of verifying or inspecting data.
De onderzoekers controleerden de gegevens zorgvuldig.
The researchers carefully checked the data.
In this sentence, 'controleerden' signifies the action of inspecting the stock, showing a completed action performed prior to another event.
We controleerden de voorraad voordat we de winkel openden.
We checked the stock before opening the store.
Here, 'controleerden' implies an investigative check or inspection to determine the source or cause of the fire.