This is the 7373rd most frequent Japanese word.
付着
Adherence; attachment; sticking.
The use of '付着' (fuchaku) here indicates that frost clings or sticks to the surface of the car window.
車の窓に霜が付着しました。
Frost adhered to the car window.
In this context, '付着' (fuchaku) describes the property of the adhesive to stick to other surfaces.
この接着剤は様々な材料に強く付着します。
This adhesive strongly adheres to various materials.
Here, '付着' (fuchaku) is used to convey that rust is attaching itself to the surface of the metal.