The word "咯咯" is a reduplicated onomatopoeia formed by repeating the single character "咯" (gē), a syllable that phonetically mimics a short, sharp sound. This specific reduplication creates a disyllabic word that vividly represents the rhythmic, repetitive sound of light laughter, a chicken's cluck, or similar staccato noises. In Chinese, such reduplication of sound-mimicking characters is a common morphological process that enhances the descriptive and auditory quality of the term, making it more expressive and lifelike than its monosyllabic counterpart.