What does cockroach mean?
A cockroach is a flattened, oval-bodied insect with long antennae and six spiny legs, belonging to the order Blattodea. Typically brown or black in colour, cockroaches are nocturnal scavengers that thrive in warm, humid environments, making kitchens, bathrooms, and other human dwellings especially attractive to them. They are notorious household pests, capable of contaminating food, spreading bacteria, and triggering allergies and asthma, so their presence indoors is usually met with alarm. Yet cockroaches are also remarkable survivors: fossils show they existed over 300 million years ago, long before the dinosaurs, and they can endure extreme conditions, including living for weeks without their head. Beyond its literal sense, "cockroach" carries a strong negative connotation and is sometimes used figuratively to describe a person regarded as sneaky or contemptible. The word is common in everyday speech, pest control contexts, biology, and popular culture alike.
nounA beetle-like insect with long antennae and legs, typically brown or black, that is a common household pest in many parts of the world. Cockroaches are among the oldest known insects, having existed for hundreds of millions of years.
- A nocturnal, flattened insect of the order Blattodea, often found in warm human dwellings and regarded as a household pest.
- Figuratively, an unpleasant or contemptible person.
"She switched on the kitchen light and a cockroach scurried across the counter into the shadows."
"The exterminator found evidence of cockroaches behind the stove."
"He's such a cockroach — always sneaking around and never taking responsibility for anything."
Regular plural formation by adding -es after the final -ch sound.
"The old apartment building was overrun with cockroaches."
Cockroaches have been around for over 300 million years — they predate dinosaurs and can survive without their head for weeks.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of cockroach
The word "cockroach" entered English in the early 17th century from the Spanish "cucaracha", which itself derives from the Latin "blatta" (a kind of moth or insect) via Old Spanish forms. The English spelling was influenced by folk etymology, blending "cock" with "roach" (a type of fish). The Spanish word spread widely through colonial languages, giving rise to related terms such as the French "coquerel"-influenced forms and various Caribbean variants.
How cockroach is actually used
"Roach" is a common informal shortening. The figurative use as an insult is informal and mildly offensive.
Easily confused with cockroach
Water bugs are aquatic insects; cockroaches are terrestrial household pests, though some large cockroach species are colloquially called water bugs.