The word "大吵大闹" is formed by combining the adjective "大" (meaning "big" or "loud") with the verb "吵" (meaning "to quarrel" or "to make noise") and then repeating the same adjective "大" with the verb "闹" (meaning "to make a scene" or "to be noisy"), resulting in a four-character compound that intensifies the sense of creating a loud and disruptive commotion.