Idea of Suppression Icon
The icon is a picture of a basic dress or athletic shoe about to stomp on a man. The shoe is coming down from the top right corner of the icon and the man is shown as much smaller than the shoe. The man is drawn from his shoulders and up, so nothing under the shoulders is visible.
This page shows the different variations of the Suppression from an Icons8 icon pack. Feel free to resize and recolor the icon, and then download the icon in PNG format for free.