Ａ. Boredom is a feeling expressing a state of disinterest.<br>
The opposite of fun is boredom. Boredom is also an emotion branching from interest's or infatuation's appraisal. It occurs when you are fatigued, you grow tried of something, and you cannot find something that is interesting.<br>
It is a state of mental fatigue, and it decreases your vitality. Some people will try to relieve it by drinking or gambling, etc. It makes you rest physically and mentally. It also causes a shift in your lifestyle through introspection.