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dau

two (2, masc.)

numeralA1

"dau" means "two (2, masc.)" in Welsh (numeral). Mutation forms: Treiglad Meddal → ddau, Treiglad Trwynol → nau.

Mutation forms

In Welsh, the first letter of "dau" changes depending on the grammatical context. These are the mutated forms:

MutationForm
Base formdau
Treiglad Meddalddau
Treiglad Trwynolnau

When does "dau" mutate?

rhwng— between (triggers treiglad meddal)

dau→rhwng ddau(between two)

"dau" in context

Un, dau, tri, pedwar, pump, chwech, saith, wyth, naw, deg.

One, two, three, four, five, six, seven, eight, nine, ten.

A1

Mae Tom a Mair ill dau'n siarad Ffrangeg yn rhugl.

Both Tom and Mary speak French fluently.

B2

Yn Sweden, er enghraifft, mae dau sefydliad cydweithredol mawr yn darparu dros 750,000 o gartrefi, sy'n golygu bod oddeutu 18 y cant o gyfanswm poblogaeth y wlad yn byw mewn tai cydweithredol.

In Sweden, for example, two large co-operative organisations provide over 750,000 homes, which equates to around 18 per cent of the total population of the country living in co-operative housing.

C1

Dau o'r pethau y credaf eu bod yn ddiddorol o'r ffigurau yn adroddiad Estyn a'r ffigurau sydd ar gael i aelodau'r cyhoedd, ac addysgwyr proffesiynol yn wir, yw'r ffaith nad oes gennym gyfres fyw o ddata ar gael.

Two of the things that I think are interesting from the figures in the Estyn report and the publicly available figures for members of the public, and indeed teaching professionals, is the fact that we don't have a live suite of data available.

C1

Dim ond dau awdurdod lleol arall sydd yng Nghymru heb ysgol uwchradd gyfrwng Gymraeg, ac mae'r ddau yna yn fy rhanbarth i—sir Fynwy a Blaenau Gwent.

Only two other local authorities in Wales have no Welsh-medium secondary school, and both are in my region, namely Monmouthshire and Blaenau Gwent.

B2

Further reading

Welsh Mutations Explained — Soft, Nasal & Aspirate →Welsh Pronunciation — It's Actually Easier Than English →How to Learn Welsh as an Adult — A Step-by-Step Roadmap →Best Apps to Learn Welsh (2026) →Browse all Welsh vocabulary →

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Related Welsh words

un

one (1)

dwy

two (2, fem.)

tri

three (3, masc.)

tair

three (3, fem.)

pedwar

four (4, masc.)

pedair

four (4, fem.)

pump

five (5)

chwech

six (6)

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