This is the 6844th most frequent Dutch word.
aanlopen
"To walk up to" or "to approach."
In this context, 'aanlopen' means to catch or jam, typically applied to mechanical issues.
De machine blijft aanlopen bij het opstarten.
The machine keeps catching when starting up.
Here, 'aanlopen' is used figuratively to mean 'to drop by' or 'to visit' a place.
Ze besloot de winkel aan te lopen om het product te kopen.
She decided to stop by the store to buy the product.
In this usage, 'aanlopen' refers to approaching or coming closer, usually in motion.