This is the 634th most frequent Dutch word.
verkeerde
"Wrong" or "incorrect."
In this sentence, 'verkeerde' is used as an adjective modifying 'bus', indicating a bus that does not go to the intended destination.
Ik nam de verkeerde bus naar huis.
I took the wrong bus home.
Here, 'verkeerde' serves as an adjective describing 'beslissing' (decision), referring to a decision that turned out to be incorrect or unwise.
Dat was een verkeerde beslissing.
That was a wrong decision.
In this context, 'verkeerde' is again an adjective modifying 'kant' (side), suggesting a side of the city that is deemed less favorable.