The word "罪魁" is formed by combining the character 罪, meaning "crime" and historically depicting a net (罒) over wrongdoing (非), with 魁, meaning "chief" or "head", composed of a dipper (斗) and ghost (鬼) to imply a dominant figure. Together, 罪 specifies the criminal aspect and 魁 denotes the leading role, resulting in a compound that means "chief culprit" or "ringleader".