perforate

Imagine an old-fashioned postage stamp with those little dotted lines that let you tear it off easily—those lines perforate the paper. To perforate something is to poke or cut holes through it, usually all the way through to the other side. A bullet can perforate armor, and hungry insects might perforate the leaves of a plant. While the word often brings to mind a series of many tiny holes, even a single hole through a surface counts. Think of a hole punch pressing through a sheet of paper or a pin going through fabric.

To perforate means to pierce or make a hole, or a series of holes, through something. It describes an action that penetrates a surface entirely. This can happen through sudden physical force, like a projectile perforating a target, or through a deliberate, mechanical process, such as the creation of perforated notebook paper or tea bags.

Historically, the word comes from Latin roots meaning "to bore through." While it can describe accidental damage—a heavy hailstorm might perforate the roof of a greenhouse—it is frequently used to describe intentional design or manufacturing. For instance, builders might use perforated metal sheets for ventilation or sound control, and factories make perforated paper, plastic, or packaging so it can tear along a clean line.

The context is key: in a medical sense, a "perforated" organ refers to a single, dangerous rupture, whereas in stationery, it refers to a neat line of punctures designed for easy tearing. Whether it is the rhythmic pattern of a sewing needle or the forceful impact of a tool, to perforate is to break through a barrier and leave a permanent opening behind.