Webster's English Dictionary

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inhibition

in.hi.bi.tion \.in-(h)*-'bish-*n\ n 1a: the act of inhibiting : the state 
   of being inhibited  1b: something that forbids or debars  2: an inner 
   impediment to free activity, expression, or functioning : as  2a: a 
   psychical activity imposing restraint upon another activity  2b: a 
   restraining of the function of a bodily organ or an agent (as an enzy me)