weaponise

IPA/ˈwep.ən.aɪz/
IPA/ˈwep.ən.aɪz/

weaponise — verb

  • weaponisepresent simple I / you / we / they
  • weaponises3rd person singular
  • weaponising-ing form
  • weaponisedpast simple

1. to take something ordinary or harmless — such as a piece of information, a law,

1.verbtransitiveC1
Definition

to take something ordinary or harmless — such as a piece of information, a law, or everyday technology — and deliberately turn it into a tool for attacking or damaging a person, group, or institution

Example

Minh argued that the government had weaponised social media algorithms to spread fear during the election.

weaponised + [technology/platform] — political manipulation context

Ignacio's opponent weaponised his ten-year-old tax mistake during the mayoral debate.

weaponised + [personal information] — personal attack in political context

Common collocations
  • weaponise information
  • weaponise personal data
  • weaponise the law
  • weaponise social media
  • weaponise fear
  • weaponise technology
Synonyms
  • exploit

    broader and weaker — implies taking unfair advantage but not necessarily transforming something neutral into a weapon

  • instrumentalise

    more formal and abstract; used mainly in philosophy and political theory; emphasises treating something as a mere instrument

  • co-opt

    implies taking over or appropriating something, often through subtle manoeuvring rather than direct attack

Grammar Patterns

weaponise + [something ordinarily harmless]

weaponise + [something] + against + [someone/something]

be weaponised (passive)

be weaponised + by + [agent] + to + [harmful purpose]

Usage Note

This is now the dominant sense, far more common than sense 2 since the early 2000s, especially in political journalism, technology reporting, and social commentary. Subject is often an institution, government, corporation, or individual; object is something not inherently harmful. Frequently passive (is being weaponised).

Common Mistakes

She weaponised her intelligence to get a promotion.
She used her intelligence to get a promotion.
Weaponising implies turning something neutral into a means of attack or harm; using a personal strength to advance yourself is not an attack.
The journalist weaponised the facts in her article.
The journalist presented the facts in her article.
Weaponising suggests a deliberate intent to harm, not simply reporting or using information.

2. to change a virus, bacterium, or toxic chemical so that it can be used as a weap

2.verbtransitiveC1
Definition

to change a virus, bacterium, or toxic chemical so that it can be used as a weapon to cause death or illness on a large scale

Example

General Castillo's regime weaponised anthrax spores and loaded them into artillery shells.

weaponised + [biological agent] — literal military context

During the Cold War, both superpowers secretly researched how to weaponise the smallpox virus.

weaponise + [virus name] — Cold War historical context

Common collocations
  • weaponise a virus
  • weaponise anthrax
  • weaponise a pathogen
  • weaponise a toxin
  • weaponise bacteria
  • extract and weaponise
Synonyms
  • militarise

    broader — refers to equipping anything for military use, not only biological agents

Grammar Patterns

weaponise + [biological/chemical agent]

be weaponised (passive)

weaponise + [agent] + into + [weapon form]

Usage Note

This is the original, narrower sense of the word, originating in military and intelligence contexts. Subject is usually a state, regime, or research programme. Distinguish from sense 1 (EXPLOIT AS ATTACK TOOL): here the resulting weapon causes physical harm through biological or chemical means.

Common Mistakes

The general weaponised his army's better training to win the battle.
The general exploited his army's better training to win the battle.
Sense 2 is specifically about turning biological or chemical agents into weapons, not about using any military advantage.
The lab weaponised a new vaccine against the virus.
The lab weaponised the virus itself, not the vaccine.
Weaponising means making something harmful into a weapon; a vaccine is protective, not a weapon.

Word family

Synonym discussion

Sense: verb/1

Weaponise implies taking something neutral or harmless and deliberately turning it into a tool of attack. Exploit is broader — it means taking unfair advantage of something but lacks the transformation-from-neutral-to-harmful frame; you exploit a loophole, but you weaponise kindness. Militarise describes equipping or conditioning something for military use, which overlaps with weaponise only in its literal biological-warfare sense. Instrumentalise is the most formal and abstract term, used mainly in philosophy and political theory to describe treating a person or principle as a mere instrument for another goal — it emphasises dehumanisation rather than active harm. Co-opt means to take over or appropriate something for a different purpose, often through subtle manoeuvring rather than direct attack. For example: 'The regime weaponised the judiciary to jail opponents' suggests active, targeted harm, while 'The regime co-opted the judiciary by appointing loyalists' describes appropriation without direct attack.

exploit ↗militarise ↗instrumentaliseco-opt ↗

Common collocations

Adverbs

  • deliberately weaponise
  • effectively weaponise

Phrases

  • weaponise something against someone
  • be weaponised by
  • be used to weaponise

Prepositions

  • weaponise against

Etymology

Old EnglishAnglo-Norman FrenchLatinGreekEnglish

Formed from the noun weapon (Old English wǣpen, of Germanic origin, meaning 'instrument of fighting or defence') and the verb-forming suffix -ise (via French -iser, ultimately from Greek -izein). The word first appeared in military and security contexts in the mid-to-late 20th century, referring to the development of biological and chemical weapons programmes. Its figurative use — applying the weapon concept to non-military domains such as politics, law, and technology — spread rapidly from the early 2000s onward and is now the more common usage.