English Reference

Word

rot

US/ˈɹɑt/

UK/ɹˈɒt/

Definitions

01to decay

B2 · Upper Intermediate Science

v. to break down or decay naturally, usually because of bacteria or fungi.

v. to undergo decomposition through biological action. Intransitive or transitive use.

“The fallen apples began to rot on the damp ground after the storm.”

“If the timber is not treated with a waterproof sealant, the constant exposure to moisture will cause the structural beams to rot within a few years.”

Antonyms

02to stay in a bad place

C1 · Advanced Informal

v. to stay in an unpleasant place or situation for a very long time.

v. to suffer or languish in a state of neglect or confinement over a prolonged period.

“He felt like he was rotting in that boring office job with no chance of promotion.”

“The political prisoner was left to rot in a damp cell for a decade before the international community intervened.”

Synonyms

languishwaste away

Antonyms

03decaying matter

B2 · Upper Intermediate Uncountable noun

n. the state of decaying, or the part of something that has decayed.

n. the process of decomposition or the resulting decayed matter itself.

“The smell of rot coming from the old wooden boat was overwhelming.”

“The surveyor identified significant dry rot in the floorboards, suggesting that the property had been poorly maintained for decades.”

Synonyms

decompositionputrefaction

Antonyms

04nonsense

C1 · Advanced Uncountable noun British English · Informal

n. silly talk or ideas that are not true.

n. verbal nonsense or worthless ideas. Uncountable in this sense.

“Don't listen to him; he's talking absolute rot about the new manager.”

“The editorial dismissed the politician's latest economic proposal as pure rot, arguing that the figures were entirely fabricated.”

Synonyms

Antonyms

Real-World Examples

“Families, Jaycee comes to believe, are “dangerous places … like nests of poisonous spiders, huddled in dark, undisturbed corners, their venom, a single drop enough to rot the body inside out”.”
The Guardian 6 Aug 2026
“For every post promoting self-harm, there’s another focused on mental well-being; for every piece of brain rot, there’s something educational, joyful, even transcendent.”
Smithsonian Magazine 17 Aug 2026

Word family

VERB

rot(C2)

ADJECTIVE

Idioms

Domain

Sports

This entry

Exam level
CambridgeCambridgeCambridge English QualificationsThe exam suite from Cambridge University Press & Assessment, from A1 Movers up to C2 Proficiency. The benchmark names double as CEFR labels.C2 ProficiencyIELTSIELTSInternational English Language Testing SystemThe 0–9 band test co-owned by the British Council, IDP, and Cambridge. Used for university entry, work, and migration.8.5–9.0TOEFL iBTTOEFL iBTTest of English as a Foreign Language, Internet-Based TestETS's academic English test, the standard route for US university admissions. Scored 0–120, with a 1–6 scale since 2026.1–6 scale: 6.0114–120
Frequency
Frequent
Level
C2 · Proficiency
Updated

QR code

englishreference.com/q/rot

English Reference