助纣为虐

助紂為虐
zhùzhòuwéinüè

to help the wicked perpetrate wicked deeds; to help a tyrant to do evil

Wiktionary

Homographs

助纣为虐 zhù Zhòuwéinüè
  1. lit. helping tyrant Zhou 商纣王 Shāng Zhòuwáng in his oppression (idiom)
  2. fig. to take the side of the evildoer
  3. giving succor to the enemy

Entry Composition

1 助 zhù
  1. to help
  2. to assist
=2 纣 Zhòu Zhou, pejorative name given posthumously to the last king of the Shang dynasty, King Zhou of Shang 商纣王 Shāng Zhòu Wáng (the name refers to a crupper 纣 zhòu, the piece of horse tack most likely to be soiled by the horse)
=2 纣 zhòu crupper (harness strap running over a horse's hindquarters and under its tail)
=3 为 wéi
  1. as (in the capacity of)
  2. to take sth as
  3. to act as
  4. to serve as
  5. to behave as
  6. to become
  7. to be
  8. to do
  9. by (in the passive voice)
=3 为 wèi
  1. because of
  2. for
  3. to
=3 为 wéi variant of 为 wéi
=3 为 wèi variant of 为 wèi
4 虐 nüè
  1. (bound form) brutal; oppressive; harsh
  2. (literary) disaster; catastrophe