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archaism /ˈɑːrkeɪɪzəm/

A word or expression that is old-fashioned or no longer commonly used in modern English. It directly refers to an uncommonly used word that has become outdated or obsolete.

Other words that fit

Use this adjective when describing a word as old-fashioned rather than naming the word itself.

Use this more technical linguistic term when referring to a word that survives mainly in fixed expressions or idioms.

Use when a word is completely out of use and no longer recognized, rather than just uncommon or old-fashioned.

Why this word

An archaism is a word or expression that is no longer commonly used in modern English but was once standard. Archaisms often appear in older literature, religious texts, or poetry, and they help us understand how language changes over time. Some archaisms disappear entirely and become obsolete, while others survive in specific contexts like Shakespeare plays or the King James Bible. Understanding archaisms is important for reading classic literature from different time periods. Note that 'archaic' is the adjective form describing something as old-fashioned, while 'archaism' is the noun referring to the old word itself.

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Frequently asked questions

Is an archaism the same as an obsolete word?
Not exactly. An archaism is old-fashioned but might still be understood, while an obsolete word is completely out of use and forgotten. All obsolete words were once archaisms, but not all archaisms become obsolete.
What's the difference between an archaism and a fossil word?
A fossil word is a specific type of archaism that survives mainly in fixed phrases or idioms. An archaism is a broader term for any old-fashioned word from an earlier period of the language.
Why do writers use archaisms?
Writers use archaisms for stylistic effect, to create an old-fashioned atmosphere, or to stay faithful to a historical period when writing historical fiction or period literature.
Can a word stop being an archaism?
Yes, if a word comes back into common use, it's no longer an archaism. This is rare but can happen when renewed historical or literary interest revives an old word.