What is the meaning of Harrow?

A device consisting of a heavy framework having several disks or teeth in a row, which is dragged across ploughed land to smooth or break up the soil, to remove weeds or cover seeds; a harrow plow.

An obstacle formed by turning an ordinary harrow upside down, the frame being buried.

To drag a harrow over; to break up with a harrow.

To traumatize or disturb; to frighten or torment.

To break or tear, as if with a harrow; to wound; to lacerate; to torment or distress; to vex.

A call for help, or of distress, alarm etc.

Source: wiktionary.org