The word entered English in the 1830s as a combining form (appearing in terms like amblyopia), borrowed from Modern Latin ambly-, from Greek amblys — literally “blunt.” The root amblys (“dull”) connects ambly- to the entire sensory-deficit roots: amblyopia (ambly- + ops → dull/dim vision), amblystoma (ambly- + stoma → blunt mouth), and amblygon (blunt angle). The combining formambly- is primarily productive in ophthalmology and biological morphology: e.g., amblyopia, amblyopic, and amblystomatidae.