[Verb] To make someone react less strongly to something that causes pain or illness. Example: I have become desensitised to the noise from the motorway, because I have listened to it for so long.
Found on http://www.bbc.co.uk/skillswise/glossary/
1. To reduce or remove any form of sensitivity. ... Synonym: deallergise. ... 2. To effect desensitization. ... 3. In dentistry, to eliminate or subdue the painful response of exposed, vital dentin to irritative agents or thermal changes. ... (05 Mar 2000) ... Found on http://www.encyclo.co.uk/local/20973