A sharpened pencil.
A sharpened knife.
He probably sharpened the knife.
He was large and thick with glowing eyes and teeth sharpened into fangs.
The blond man's smile was slow, predatory, his teeth sharpened into points and his dark gaze piercing.
One smiled coldly, revealing its sharpened teeth, while another was the first to take a step towards her.
Their weapons were the wooden club or waddy notched to the grasp, and spears of sticks, often crooked but well balanced, with points sharpened by tool or fire, and sometimes.