Fossil word

Broadly obsolete words that remain in idiomatic use

A fossil word is a word that is broadly obsolete but remains in current use due to its presence within an idiom or phrase. An example for a word sense is 'ado' in 'much ado'. An example for a phrase is 'in point' (relevant), which is retained in the larger phrases 'case in point' and 'in point of fact', but is rarely used outside of a legal context.

This keyword could refer to multiple things. Here are some suggestions: