lacerate
To tear something deeply and roughly, causing a bad wound.
To lacerate means to tear or cut something roughly and deeply, leaving jagged, uneven edges. If you've ever caught your shirt on a fence and ripped it badly, creating a rough, torn gash instead of a clean cut, you've seen what a laceration looks like. A doctor might treat a lacerated knee after someone falls on gravel, where the skin is torn and scraped rather than neatly sliced.
Doctors describe lacerations as wounds with torn tissue. Unlike a paper cut, which is clean and thin, a laceration is rough and irregular. A broken tree branch might lacerate your arm as you push through dense woods, or sharp rocks might lacerate a hiker's hands during a fall.
Writers also use lacerate figuratively to describe harsh criticism that tears at someone's feelings. A mean review might lacerate an artist's confidence, or cruel words might lacerate someone emotionally. In this sense, the word captures how deeply cutting remarks can wound someone's spirit, leaving them feeling torn up inside, just as skin can be physically torn.