cockroach
Americannoun
noun
Etymology
Origin of cockroach
1615–25; < Spanish cucaracha, of uncertain origin, assimilated by folk etymology to cock 1, roach 2
Explanation
A cockroach is a large insect that's a familiar urban pest. If you've got cockroaches in your apartment, you'll see them scatter when you flip on the light in your kitchen at night. Cockroaches have been around for hundreds of millions of years, and experts guess they might outlive humans. These hardy insects have adapted to so many threats over time that they're nearly indestructible today. For example, radiation that would kill you won't harm a cockroach. It's almost impossible to drown them (they can live for hours without oxygen), and they're immune to most of the poisons people use on them. Cockroach comes from the Spanish cucaracha, "beetle."
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Hundreds of young people gathered for it, many of them wearing cockroach face masks.
From The Wall Street Journal • Jun. 7, 2026
Gautam Tamboliya, a 21-year-old student from India’s Haryana state, carried India’s national flag and wore a lapel pin with an image of a cockroach on it.
From The Wall Street Journal • Jun. 7, 2026
Pest controllers have reported a rise in callouts to cockroach infestations in Cardiff, with one company regularly getting five or six reports a week.
From BBC • May 28, 2026
"I turned on the light and I could see a cockroach running, two or three were running."
From BBC • May 28, 2026
Or the fact that a headless cockroach can survive for more than two weeks.
From "Crenshaw" by Katherine Applegate
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
