Question

give the meaning of the following idiom to have an axe to grind​

Answer 1

Axe to Grind. To have a grievance with someone, especially where one feels the need to seek damaging retribution. The phrase probably originates from the act of sharpening an axe with a grinding wheel, with the intent (in this definition) to get revenge on someone by maiming or killing them. ;)

Answer 2

Have a strong opinion or point of view about something.