tolerance
tol·er·ance
noun \ˈtäl(-ə)-rən(t)s\Definition of TOLERANCE
1
: the capacity of the body to endure or become less responsive to a substance (as a drug) or a physiological insult especially with repeated use or exposure <developed a tolerance to painkillers>
2
: the immunological state marked by unresponsiveness to a specific antigen
Learn More About
Seen & Heard 
What made you want to look up tolerance? Please tell us where you read or heard it (including the quote, if possible).
