Unthreaded

Part of speech: adjective

Definitions

1. Not having thread passed through something, or lacking the grooves or ridges that allow something to be screwed into place
2. Not possessing the necessary threads or ridges for fastening securely or linking components properly
3. Lacking the necessary grooves or spirals that enable secure connections or fittings between objects

Etymology: "Unthreaded" is the past form of "unthread," which means to draw a thread back out of something it has passed through. The "un-" comes from Old English "on-" and "and-", which meant "against" or "back" before it came to signal reversal. Its ancestor, Proto-Germanic "*anda-", carried that sense of opposition, so the prefix began as a word for turning against something rather than as a simple negation. The adjective sense, lacking the grooves or ridges that let something be screwed into place, follows from the same idea: a threaded part is one that has been given a spiral ridge, and an unthreaded one has none. "Thread" itself descends from Old English "thræd", and the English compound was formed by attaching the reversing prefix to that existing word.

Synonyms: detached, disengaged

Antonyms: threaded, attached