In Chinese folk belief, 蜈蚣 is one of the 「five venomous creatures」 (五毒 wǔdú), along with snakes, scorpions, toads, and lizards. It appears in traditional medicine and folklore.
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Both characters 蜈 and 蚣 contain the insect radical 虫, which is a reliable signal that a word refers to a bug or creepy-crawly creature.