The crossbow trigger was a powerful device in early Chinese warfare that had a profound impact on military tactics. Against such a background, the word for “trigger,” namely ji, became a pregnant metaphor in ancient texts from the Warring States onwards. It refers to the correlation between a “subtle” initial state and a “dangerous” and far-reaching consequence, because the small movement of pulling the trigger may kill a person at a great distance. Borrowing insights from Hans Blumenberg's metaphorology, I offer a new theory of the original meaning of ji and argue that the trigger mechanism inspires a complex metaphorical scheme that consists of three levels of ambiguities and a web of associated images. It provides a linguistic and cognitive pattern for organizing a wide range of heterogeneous life-world situations, from the moral precariousness of human speech to the vulnerability of an outnumbered army in battle.