Definition

1. Verb (transitive):
   • To make someone or something more aware, responsive, or reactive to a particular stimulus, condition, or issue: The process of increasing sensitivity or consciousness.
   • To make a material (especially photographic film or paper) sensitive to light or other forms of radiation: A chemical process for use in photography.
   • To cause an organism to develop an allergic or reactive response to a substance: Often used in medical or biological contexts regarding allergies or drug reactions.

Usage and Examples

• Making someone aware or responsive:

  • The training aimed to sensitise the staff to cultural differences in the workplace.
  • Documentaries can sensitise the public to environmental problems.

• Making a material photosensitive:

  • In the darkroom, you must sensitise the paper before exposing it to light through the negative.

• Causing an allergic or reactive response:

  • Repeated exposure to the chemical can sensitise the skin, leading to a rash.
  • Some antibiotics may sensitise patients, causing future doses to trigger an allergic reaction.

Advanced Usage and Nuances

• In Social Contexts: Often used in discussions about social awareness, diversity training, or education to describe the process of fostering understanding and empathy.

  • The workshop was designed to sensitise managers to unconscious bias.

• In Medicine/Immunology: Describes the process where an initial exposure to an allergen primes the immune system to react strongly upon subsequent exposures.

  • The first bee sting can sensitise an individual, making a second sting potentially dangerous.

Variants and Related Words

• Sensitize: The preferred spelling in American English. "Sensitise" is the common spelling in British English.
• Sensitisation/Sensitization (noun): The act or process of making sensitive.
  • Public sensitisation to the issue has led to policy changes.
• Desensitise (verb): The opposite action; to make less sensitive.
• Sensitive (adjective): Responsive to or aware of stimuli, feelings, or nuances.
• Sensitivity (noun): The quality or state of being sensitive.

Synonyms

• Acquaint: To make familiar or aware.
• Alert: To make aware of a potential issue.
• Prime: To prepare or make ready to respond.
• Photosensitise: Specifically for making sensitive to light (a more precise synonym in technical contexts).

Phrasal Verbs / Common Collocations

• Sensitise someone to something: This is the standard construction.
  • The program sensitises students to the challenges faced by refugees.
• Become sensitised to something: Describes the resulting state of the person or organism.
  • After living abroad, he became sensitised to different communication styles.

Notes on Meaning

• The core meaning involves inducing a state of heightened responsiveness. This can be:
  • Cognitive/Emotional: Increasing awareness or empathy (e.g., to social issues).
  • Physical/Chemical: Altering a material's properties (e.g., photographic film).
  • Biological/Immunological: Triggering a physiological reaction (e.g., an allergy).
• It is a causative verb; the subject causes the object to become sensitive.

Verb

1. make sensitive or aware
   • He was not sensitized to her emotional needs
2. make (a material) sensitive to light, often of a particular colour, by coating it with a photographic emulsion
   • sensitize the photographic film
3. make sensitive to a drug or allergen
   • Long-term exposure to this medicine may sensitize you to the allergen
4. cause to sense; make sensitive
   • She sensitized me with respect to gender differences in this traditional male-dominated society
   • My tongue became sensitized to good wine