English Reference
verb · noun

thrash

v. · n.
US /ˈθɹæʃ/ UK /θɹˈæʃ/ thrash UK spelling thrashed, thrashes, thrashing

  1. 01 B2 Upper Intermediate

    v.to move your arms and legs around in a violent or uncontrolled way.

    v.to move about wildly or violently; to flail, often as a result of struggle or lack of control.

    Simple

    The swimmer began to thrash his arms in the water when he felt a cramp.

    In context

    The injured animal continued to thrash about in the undergrowth, making it difficult for the vet to administer a sedative safely.

    flailtosswrithe
  2. 02 B2 Upper Intermediate Informal Sport

    v.to beat an opponent or another team by a very large score.

    v.to defeat an opponent utterly or decisively in a competition or contest.

    Simple

    Our local team managed to thrash the champions four-nil in a surprise victory.

    In context

    The incumbent candidate thrashed his rival in the primary election, securing a majority in nearly every district.

    trounceroutcrush
  3. 03 C1 Advanced Literary

    v.to hit a person or animal many times as a punishment.

    v.to beat mercilessly or repeatedly, typically with a stick or whip.

    Simple

    In the old novel, the cruel master threatened to thrash the servant for being late.

    In context

    The historical account describes how prisoners were thrashed for the slightest infractions of the camp's arbitrary rules.

  4. 04 C2 Proficiency Technical Computing

    v.when a computer spends all its time moving data instead of doing work, making it very slow.

    v.to undergo poor performance in a virtual memory system where excessive paging prevents productive processing.

    Simple

    The server started to thrash because too many heavy applications were running at once.

    In context

    System throughput plummeted as the machine began to thrash, with the hard drive light remaining solid due to constant page swaps.

  5. 05 B2 Upper Intermediate Informal Music

    n.a fast and loud type of heavy metal music.

    n.a subgenre of heavy metal music characterised by its fast tempo and overall aggression.

    Simple

    He spent his teenage years listening to thrash and playing the drums.

    In context

    The band's early work is considered a cornerstone of eighties thrash, blending punk speed with complex guitar structures.

    thrash metal

A meeting between Miguel Ángel Gil Marín, the club’s chief suit, and Alvarez is scheduled, where the latter’s future will be thrashed out.

The Guardian· 18 Aug 2026

They thrashed Hungary 6-0 and scored umpteen long-range screamers before losing 4-3 to Belgium in a thriller.

The Guardian· 12 Aug 2026

From Middle English thrasshen, a dialectal variant of thresshen, threshen (whence the modern English thresh), from Old English þrescan, from Proto-Germanic *þreskaną, whence also Old High German dreskan, Old Norse þreskja.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Origin gem-pro *þreskaną
Level B2 · Upper Intermediate
Frequency Occasional
Updated