Words to Describe blackmailers

How blackmailers often is described ("________ blackmailers")

• amateur
• nuclear
• arab
• brave
• successful
• polish
• most
• many
• passive
• clear
• political
• infant
• emotional
• young
• potential
• foreign
• vile
• common
• notorious
• financial
• professional
• clever
• mere
• criminal
• unscrupulous
• dirty
• international
• communist
• petty
• plain