ruthless /roothˈləs/

1. Pitiless, brutal
2. Severe, unsparing

• Master of the Revels
• Master of the Rolls
• Master of the Sentences
• Master of the Temple
• master page
• master pages
• master-passion
• masterpiece
• masterpieces
• master race
• master races
• masters
• masters-at-arms
• master sergeant
• master sergeants
• mastership
• masterships
• mastersinger
• mastersingers
• master-slave manipulator
• masters of the schools
• masterstroke
• masterstrokes
• master-switch
• master-switches