This phrase refers to vocabulary suitable for crossword puzzles. Such vocabulary tends to be short, often archaic, and sometimes slightly obscure, fitting the constraints of the grid and offering a satisfying challenge to solvers. Consider, for example, words like “isle,” “ore,” “ewe,” or “erne.” These terms appear frequently in crosswords due to their brevity and useful letter combinations, despite being less common in everyday conversation.
A rich lexicon of these short, often less-common terms is beneficial for both constructors and solvers of crossword puzzles. For constructors, they provide flexibility in grid design and allow for intricate wordplay. For solvers, encountering and successfully deciphering these words offers a sense of accomplishment and expands their vocabulary. Historically, the use of such terms in crosswords reflects the evolution of the puzzle itself, from simple word squares to the complex, themed grids seen today. This specialized vocabulary has become a hallmark of the crossword, contributing to its enduring popularity.