sign-language

The compound "sign-language" is a transparent English formation that directly combines two native elements to describe a specific communication system. The word "sign" traces back to the Latin signum, which conveyed the core idea of a distinguishing mark or signal. "Language" originates from Latin lingua, literally "tongue," which became a metonym for speech and, by extension, any system of communication. The compound, emerging in the early 19th century, logically applies the concept of "sign" to the domain of "language," creating a term for a linguistic system based on visual-gestural signs rather than vocal-auditory speech. This formation highlights how English can build precise terminology by combining familiar, semantically clear components.

Structure: sign (visual symbol) + language (system of communication) - sign: From Latin signum meaning "mark, token, indication, signal." In this compound, it functions as a modifier specifying the mode of communication as visual and gestural. - language: From Old French langage, from Latin lingua meaning "tongue, speech, language." In this compound, it functions as the head noun, indicating the system of communication.