zhù zhòu wéi nüè
lit. helping tyrant Zhou 商紂王|商纣王[Shang1 Zhou4 wang2] in his oppression (idiom)
fig. to take the side of the evildoer; giving succor to the enemy
助
zhù
to help
纣
zhòu
crupper (harness strap running over a horse's hindquarters and under its tail)
为
wéi
variant of 為|为[wei2]
虐
nüè
(bound form) brutal; oppressive; harsh