投敌: go over to the enemy; defect to the enemy; surrender to the enemy
变节: make a political recantation; change of loyalty; betrayal; turn one's coat; turnabout; fall away◇变节分子 recanter; turncoat; apostate; deserter; renegade; backslider
倒戈投敌: turn renegade; be a turncoat; betray to the enemy