The word **捆绑** is a compound formed by combining two synonymous characters, **捆** (kǔn) and **绑** (bǎng), both meaning "to tie" or "to bind." Each character independently contains the silk/thread radical (**纟**), indicating an action involving ropes or cords, while their right-side components (**困** and **邦**) primarily provide phonetic clues. When paired, they create a single, reinforced concept—**to bind together**—where the repetition intensifies the meaning, resulting in a word that vividly conveys the act of tightly fastening or restricting something, often used both literally (e.g., tying objects) and metaphorically (e.g., bundling services or restricting freedom).