polyamide

The word 'polyamide' is a modern scientific compound formed in the early 20th century. It combines the Greek-derived prefix 'poly-', meaning "many", with the chemical term 'amide', which denotes an organic compound derived from ammonia. The logic is perfectly literal: a polyamide is a polymer (a large molecule) composed of many repeating amide units. This naming convention follows a systematic pattern in chemistry, where 'poly-' prefixed to a molecular unit's name clearly indicates a long-chain synthetic material, such as polyester or polyethylene.

Structure: poly (many) + amide (type of chemical compound) - poly: From Greek poly-, meaning "much, many". A combining form acting as a prefix. - amide: From the international scientific vocabulary, based on ammonia and the suffix -ide. It functions as the core noun.