Main entry: kill off, exterminate
Definition: kill en masse; kill on a large scale; kill many
Usage: Hitler wanted to exterminate the Jews, Gypsies, Communists, and homosexuals of Europe
Main entry: root out, eradicate, exterminate, extirpate, uproot
Definition: destroy completely, as if down to the roots
Usage: the vestiges of political democracy were soon uprooted root out corruption