screw-top

The compound "screw-top" is a modern descriptive term from the late 19th/early 20th century, created from two native English words to name a new type of closure mechanism. The first element, "screw," refers to the helical ridge or thread, a concept whose name likely entered English via French. The second element, "top," is a very old English word for the highest part. The compound's logic is transparent: it literally denotes a "top that operates via a screw thread." This practical naming convention directly links the physical action of twisting (screwing) with the object being secured (the top or lid), efficiently describing its function.

Structure: screw (fastening device) + top (uppermost part) screw: From Middle French escroue, of uncertain origin, possibly from a Germanic source. In this compound, it functions as a noun used attributively to describe the type of top. top: From Old English topp (summit, crest). In this compound, it functions as a noun meaning the lid or cap.