The word "粉身碎骨" is formed by combining two verb-object phrases: "粉身" meaning "to powder the body" with 粉 as a verb indicating reduction to powder and 身 as the object meaning body, and "碎骨" meaning "to shatter the bones" with 碎 as a verb indicating breaking and 骨 as the object meaning bones. These phrases are placed in sequence to create a compound that literally describes the body being pulverized and the bones crushed, emphasizing total physical destruction.