The word "绊倒" is formed by combining the characters "绊" and "倒". "绊" is a phonetic-semantic compound where the radical "纟" (silk) denotes entanglement or ropes, and "半" provides the phonetic clue, meaning to trip. "倒" is also a phonetic-semantic compound with the radical "亻" (person) indicating involvement of a person, and "到" supplying the sound, meaning to fall. Together, they sequentially depict the action of tripping and then falling.