This is the 13690th most frequent German word.
einlaufen
To shrink, arrive, or enter (depending on context).
Here 'einlaufen' is used to convey 'to shrink,' typically in the context of fabrics or materials.
Die Wäsche kann einlaufen, wenn sie heiß gewaschen wird.
The laundry can shrink if it is washed in hot water.
In this context, 'einlaufen' means 'to enter,' typically used for ships or trains arriving at designated locations.
Das Schiff wird bald in den Hafen einlaufen.
The ship will soon enter the harbor.
Here, 'einlaufen' refers to the process of wearing new shoes so they become comfortable.