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1. Making susceptible or sensitive to either physical or emotional stimuli
   - sensitizing

1. Rendering an organism sensitive to a serum by a series of injections
   - sensitizing, sensitization, sensitisation [Brit]

1. Cause to sense; make sensitive
   "She sensitised me with respect to gender differences in this traditional male-dominated society"; "My tongue became sensitised to good wine"
   - sensitize
    
2. Make sensitive to a drug or allergen
   "Long-term exposure to this medicine may sensitise you to the allergen"
   - sensitize
    
3. Make (a material) sensitive to light, often of a particular colour, by coating it with a photographic emulsion
   "sensitise the photographic film"
   - sensitize
    
4. Make sensitive or aware
   - sensitize, sensify, sensibilize, sensibilise [Brit]

See also: predisposition, sensitisation [Brit], sensitiser [Brit], sensitivity

Type of: alter, change, immunisation [Brit], immunization, modify

Antonym: desensitise [Brit]