The Chinese word 战战兢兢 is formed by combining two reduplicated components: 战战, which repeats the character 战 (meaning to tremble or shake) to intensify the sense of physical trembling, and 兢兢, which repeats the character 兢 (meaning cautious or vigilant) to emphasize mental wariness; these paired repetitions merge into a single compound word depicting a state of extreme fear and caution.