Discontent (noun)

1. A feeling of dissatisfaction with one's circumstances.
2. The state of being unhappy or dissatisfied with one's situation or condition.
3. The feeling of being discontent.

Origin:

Late middle english: from old french discontent, from des- (expressing negation) + content "content".

Examples:

1. There is a general sense of discontent among the employees.
2. The discontent of the public was reflected in the polls.
3. His discontent was evident in his tone.
4. The discontent with the government's policies.
5. Her discontent with her job was clear.