This is the 1378th most frequent Dutch word.
treinen
"Treinen" means "trains" (plural of train) or "to travel by train" in Dutch.
In this sentence, 'treinen' refers to the plural form of 'train', indicating the vehicles used for transportation.
De treinen rijden elke dag op tijd.
The trains run on time every day.
Here, 'treinen' specifically denotes trains as objects for photography and a subject of interest.
Hij vindt het leuk om treinen te fotograferen.
He enjoys photographing trains.
In this context, 'treinen' is used as a verb meaning 'to train', belonging to actions at a certain location.