ruffian

n. 恶棍,无赖
a. 儿恶的,残忍的,残暴的

A hired ruffian; a thug.

打手一个被雇的恶棍；暴徒

He is one of the greatest ruffians who ever cheated the gallows.

他是一个曾经逃过绞刑的最坏的恶棍。