AAAmerican Accent US
Illustration: the history of the word knife
ksilentnife
A sound people stopped saying

Why is there a K in knife?

Knife came into late Old English as cnīf, probably from the Vikings' Old Norse knífr, and the K was pronounced. Here is how it went silent.

Then · late Old English

cnīf

said like k-NEEF

1600s↓

Now · American English

knife/naɪf/

said NIFE

The story

Knife is younger than most of the silent-K words. It appears in late Old English as cnīf, and it most likely came from Old Norse knífr — one of many everyday words the Viking settlers gave to English, alongside knife's neighbors egg, skin and window.

Two things have happened to it since. First, the K was pronounced, as it was in every kn- word: cnīf began with "k-n". Educated speech dropped that K in the 1600s. Second, the vowel moved. The ī was a long "ee", so the word sounded like "k-NEEF". The Great Vowel Shift (roughly 1400-1600) turned long "ee" into the "eye" diphthong, giving modern NIFE.

The spelling preserves both stages of the past: a K nobody says and an I that no longer sounds like "ee".

How the word changed

  1. 1

    Old Norse

    knífr

    The likely source.

  2. 2

    Late Old English (1000s)

    cnīf

    K pronounced; ī is a long "ee": k-NEEF.

  3. 3

    Great Vowel Shift (1400-1600)

    knife

    "ee" becomes "eye".

  4. 4

    1600s

    knife

    The K is dropped: NIFE.

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Questions people ask

+Where does the word knife come from?

From late Old English cnīf, most likely borrowed from Old Norse knífr, the language of the Viking settlers.

+Why is the K in knife silent?

English stopped pronouncing the kn- cluster in the 1600s, after the spelling had already been fixed.

+How do you pronounce knives?

NIVZ, /naɪvz/ — the F turns into a V and the S is pronounced as Z.

More words with a story

kneeNEE

Knee was pronounced "k-NAY-oh" in Old English, K and all. German Knie still says the K. Here is when English dropped it and why the spelling stayed.

knowNOH

Know comes from Old English cnāwan, pronounced with a K. It shares an ancient root with Latin cognoscere and Greek gnosis. Here is how the K went silent.

knightNITE

Knight was once pronounced with a K and a throaty GH, something like "k-NIKHT". Here is how both sounds disappeared and the spelling stayed.

FridayFRY-day

Friday is named for Frig, the Germanic goddess matched with Venus. Its I once sounded like "ee" — the Great Vowel Shift turned it into "eye".

Part of

Why is there a K in knife?