If you have a grievance about something that has happened or been done, you believe that it was unfair.
双语例句
例： They had a legitimate grievance.
他们的抱怨是有道理的。
例： The main grievance of the drivers is the imposition of higher fees for driving licences.
让司机们深感不满的是对驾驶执照的收费提高了。