Siping means cutting thin slits in a surface, especially in a tire, to improve traction on wet or icy roads.
Siping is a way to make things safer to use in bad weather.
Examples:
The mechanic is siping the tires for better grip.
Siping the shoes helps prevent slipping on ice.
She is siping the rubber to make it safer.
The siping on the tires looks like little cuts.
Siping the tires makes them work better in the rain.
I am siping the banana to make it easier to peel.