3rd person: crunchens
To make or become crunchy; crisp; crispen; crispify; crunchify; crustify.
In most situations, we will likely succeed with only a slightish pregreasing. Initial oiling with a feather or occasional oil-dripping along the crunchening circumference should do. (Source: J∙ Okram - Bartonian Potato Pancakes ● Cooking Recipe.)