Which term refers to a state of feeling unhappy or dissatisfied with one’s job?

The most fitting term that refers specifically to a state of feeling unhappy or dissatisfied with one’s job is "disgruntled." This word encompasses feelings of dissatisfaction and often implies an element of resentment or annoyance, particularly in a work context. When someone is described as disgruntled, it typically suggests that they have not only a sense of unhappiness but also a deeper feeling of being wronged or unhappy with the way things are at their workplace.

The other terms, while related to negative feelings, do not exclusively convey the job-related context in the same way. "Discontent" can refer to a general dissatisfaction but isn't specific to a job setting. "Unhappiness" is broader and could apply to any area of life, while "frustration" points more toward feelings of irritation or annoyance, which may or may not be linked specifically to job dissatisfaction. Therefore, "disgruntled" is the most precise choice for expressing job dissatisfaction.