inhibition

noun

• a feeling that makes one self-conscious and unable to act in a relaxed and natural way:the children, at first shy, soon lost their inhibitions a powerful tranquilizer that causes lack of inhibition
• Psychology a voluntary or involuntary restraint on the direct expression of an instinct.
• the action of inhibiting, restricting, or hindering a process.
• the slowing or prevention of a process, reaction, or function by a particular substance.