What does desensitise mean?
Desensitise means to make a person, organism, or substance less sensitive to something — either by reducing emotional responsiveness through repeated exposure, or by diminishing a physical or allergic reaction. The word appears most often in discussions of media and psychology, where critics worry that constant exposure to violent or distressing imagery can desensitise audiences, dulling their natural empathy and making tragedy feel ordinary. It also has precise technical uses: allergists desensitise patients by administering gradually increasing doses of an allergen, and physiologists speak of receptors becoming desensitised after sustained stimulation. The verb takes the -ise spelling characteristic of British English, while American usage prefers desensitize. Because the word captures a phenomenon central to debates about media, war, medicine, and human empathy, it remains a valuable term for describing how responsiveness — emotional or biological — can be deliberately or inadvertently worn down.
verbTo make someone or something less sensitive or less responsive to a stimulus, whether physical (such as a drug or allergen) or psychological (such as repeated exposure to violence). In medicine, it also means to treat a person so as to reduce an allergic or hypersensitive reaction.
- To cause a person to become less emotionally responsive to something, typically through repeated exposure (e.g., to violence, suffering, or disturbing content).
- In medicine and pharmacology, to reduce an abnormal or excessive sensitivity or allergic reaction, often by gradual controlled exposure.
- To render a tissue, cell, or receptor less responsive to a stimulus such as a drug, chemical, or physical agent.
- In photography, to reduce the sensitivity of photographic material to light.
"Constant exposure to violent imagery can desensitise viewers to real-world suffering."
"Soldiers are trained under simulated combat conditions so that they are not easily desensitised to danger."
"The allergy specialist used gradually increasing doses to desensitise the patient to bee venom."
Every time you scroll past shocking headlines without flinching, you're experiencing the very process this word names — and psychologists have tracked it in lab studies since the 1960s.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of desensitise
Desensitise is formed from the prefix de- (indicating removal or reversal) attached to sensitise, which derives from 'sensitive', ultimately rooted in the Latin verb sentire, meaning 'to sense or feel'. The word emerged in the 19th century alongside other scientific coinages built on sensitis-, first appearing in physiological and medical writing before extending into psychological usage in the 20th century. Its Latin root sentire also gives English words such as sensation, sentiment, and sensible, all sharing the core idea of perception or feeling.
Related word forms
How desensitise is actually used
The spelling with -ise is standard in British English; American English typically uses desensitize. The word carries a largely neutral-to-negative connotation: it is most frequently used in discussions of media exposure, trauma, and moral concern about emotional numbing. In clinical contexts (e.g., systematic desensitisation), it is a technical term without negative connotation. The reflexive construction 'be/become desensitised to' is far more common than direct transitive use in everyday speech.
Easily confused with desensitise
Desensitize is the standard American spelling of the same verb, while desensitise is the preferred British spelling.