Definitions of subvert:

• verb:   destroy completely

  Example: "We must not let our civil liberties be subverted by the current crisis"

• verb:   cause the downfall of; of rulers

  Example: "Subvert the ruling class"

• verb:   corrupt morally or by intemperance or sensuality

  Example: "Do school counselors subvert young children?"

• verb:   destroy property or hinder normal operations