Greek hero of the Trojan War in Homer's Iliad, whose body could be wounded only at the heel. Chinese uses 阿基里斯之踵 (Achilles' heel) for a fatal weak point.
Mainland texts usually write him 阿喀琉斯, while 阿基里斯 is the Taiwan and Hong Kong form; the best-known Chinese Iliad translations use 阿基琉斯. Zeno's paradox of the runner who never catches the tortoise is 阿基里斯追龟.