skärpa

Etymology
From, from. A derivative of.

Noun

 * 1) sharpness; the cutting ability of an edge
 * 2) sharpness, distinctness in an image

Verb

 * 1) (about a cutting blade, or an argument) sharpen; to make sharp
 * 2) tighten; to make stricter
 * 3)  to straighten up (become focused and serious, improve one's behavior, stop messing around)
 * 1)  to straighten up (become focused and serious, improve one's behavior, stop messing around)