/ ˈgriːvəns; NAmE / noun
grievance (against sb) something that you think is unfair and that you complain or protest about :
Parents were invited to air their grievances (= express them) at the meeting.
He had been nursing a grievance against his boss for months.
Does the company have a formal grievance procedure (= a way of telling sb your complaints at work) ?
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WORD ORIGIN
Middle English (also in the sense injury ): from Old French grevance , from grever to burden, based on Latin gravare , from gravis heavy, grave.