Disgruntlement (noun)

A feeling of discontent or dissatisfaction.

Origin:

From the old french word 'desagruntlement' which means 'displeasure'.

Examples:

1. The employee's disgruntlement was apparent in his tone of voice.
2. The workers' disgruntlement with their working conditions led to a strike.
3. The citizen's disgruntlement with the government was evident in the election results.
4. The student's disgruntlement with the school's policies was clear in the protest.
5. The customer's disgruntlement with the product was expressed in the negative review.