The answer to 'what is cockroach' is that a cockroach is a type of insect that is known for being a common household pest. Cockroaches are typically brown or black in color, have flat, oval-shaped bodies, and can range in size from about 1/2 inch to 2 inches long. They have six legs and two long antennae, and are known for their ability to run quickly and hide in small cracks and crevices.
Cockroaches are omnivores, meaning they will eat a wide variety of foods, including both plant and animal matter. They are often found in kitchens, bathrooms, and other areas where food and moisture are present. Cockroaches can also spread diseases and contaminate food, making them a nuisance and a potential health hazard in the home.