subvert
sub.vert \s*b-'v*rt\ vt [ME subverten, fr. MF subvertir, fr. L subvertere, lit., to t]urn from beneath, fr. sub- + vertere to turn - more at WORTH 1: to overturn or overthrow from the foundation : RUIN 2: to pervert or corrupt by an undermining of morals, allegiance, or faith - sub.vert.er n