Abstract
The foundation of ancient, invented writing systems lies in the predominant iconicity of their sign shapes. However, these shapes are often used not for their referential meaning but in a metaphorical way, whereby one entity stands for another. Metaphor, including its subcategories pars pro toto and metonymy, plays a crucial role in the formation of the earliest pristine invented scripts, yet this mechanism has been understudied from a cognitive, contextual, and comparative perspective. This article aims to address issues pertaining to the definition, development, and application of these mechanisms in the formation of the Mesopotamian, Egyptian, and Chinese scripts. We analyze the local cases of metaphor-in-action in primary inventions, focusing first on visual metaphors and, second, on the typical or idiosyncratic uses of metonyms.