AAAmerican Accent US
Illustration: the history of the word two
twsilento
A sound people stopped saying

Why is there a W in two?

Two comes from Old English twā, said with a real W. The W is still heard in twelve, twenty, twin and between — the same root, a sound that survived.

Then · Old English

twā

said like TWAH

after Middle English (by the 1600s)↓

Now · American English

two/tu/

said TOO

The story

Two comes from Old English twā, and the W was pronounced: roughly TWAH. It is the same ancient number as German zwei, Dutch twee and Latin duo — and English still has the old W-form in the archaic twain.

In Middle English the vowel became a long, rounded "oh" — the word sounded like TWOH. A W followed by a strongly rounded vowel is a near-duplicate: both are made with pursed lips. The W was absorbed into the vowel, and as the vowel itself rose to "oo", the result was modern TOO.

The best evidence that the W was real is all around it. In words where the W did not sit next to that rounded vowel, it survived: twelve, twenty, twin, twice, twilight and between all belong to the same "two" family, and in every one of them the W is still pronounced.

The spelling two also does a useful job today: it separates the number from to and too, which sound exactly the same.

How the word changed

  1. 1

    Old English (before 1100)

    twā

    W pronounced: TWAH.

  2. 2

    Middle English (1100-1500)

    two

    The vowel rounds to "oh": TWOH.

  3. 3

    Early Modern English

    two

    The W merges into the rounded vowel, which rises to "oo".

  4. 4

    Modern English

    two

    TOO — but twelve, twenty, twin and between keep the W.

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Questions people ask

+Why is two spelled with a W?

Because the W was once pronounced. Old English twā was said "twah". The W was later absorbed into the rounded vowel that followed it.

+Why do twelve and twenty have a W sound but two doesn't?

They come from the same root, but their W was not next to a rounded "oh" vowel, so it was never absorbed.

+Do two, to and too sound the same?

Yes — all three are pronounced /tu/ when stressed. In fast speech, to usually weakens to "tuh".

More words with a story

swordSORD

Sword comes from Old English sweord, and the W was pronounced. German Schwert still has it. Here is how English lost the W but kept the spelling.

answerAN-ser

Answer comes from Old English andswaru, "a sworn reply" — it contains the word swear. That is where its silent W comes from.

writeRITE

Write comes from Old English wrītan, once said with a real W. Writing first meant scratching runes into wood. Here is how the W went silent.

wrongRAWNG

Wrong once meant "crooked, twisted" and was said with a real W. It is related to wring. Here is how the W went silent while the spelling stayed.

Part of

Why is there a W in two?