The word "大刀阔斧" is formed by combining two parallel noun phrases: "大刀" (big knife) and "阔斧" (broad axe). Each phrase pairs an adjective (大 for "big" and 阔 for "broad") with a noun (刀 for "knife" and 斧 for "axe"), creating a compound that literally depicts large, sharp tools. This juxtaposition of similar concrete objects directly conveys the figurative sense of forceful, decisive action through aggregated imagery.