This is the 7059th most frequent Dutch word.
arriveerden
"Arriveerden" is the past tense plural form of "arriveren," meaning "arrived."
'Arriveerden' here is used as the past tense of 'arriveren', indicating the completed action of arriving.
Zij arriveerden bij het station net op tijd.
They arrived at the station just in time.
In this sentence, 'arriveerden' shows the past action of the guests' arrival.
De gasten arriveerden een uur later dan gepland.
The guests arrived an hour later than planned.
'Arriveerden' is used here figuratively to express the completion of the ambulance arriving at the scene.