saddle crupper (harness strap on horse's back)

strokes 9
strokes after radical 3
商纣王 商紂王 shang1 zhou4 wang2
King Zhou of Shang (11th century BC), notorious as a cruel tyrant

武王伐纣 武王伐紂 wu3 wang2 fa2 zhou4
King Wu of Zhou 周武王 overthrows tyrant Zhou of Shang 商紂王|商纣王

纣辛 紂辛 zhou4 xin1
Zhou Xin (c. 11th century BC), last emperor of the of Shang Dynasty

助纣为虐 助紂為虐 zhu4 zhou4 wei2 nve4
lit. helping tyrant Zhou 商紂王|商纣王 in his oppression (idiom); fig. to take the side of the evildoer; giving succor to the enemy