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ychwanegu

to add

"ychwanegu" means "to add" in Welsh. Full conjugation table with present, imperfect, preterite, future, conditional, and imperative tenses.

Present

Presennol

PersonForm
I (fi)ychwanegaf
You sg. (ti)ychwanegi
He/She (fe/hi)ychwanega
We (ni)ychwanegwn
You pl. (chi)ychwanegwch
They (nhw)ychwanegant
Impersonalychwanegir

Imperfect

Amherffaith

PersonForm
I (fi)ychwanegwn
You sg. (ti)ychwanegit
He/She (fe/hi)ychwanegai
We (ni)ychwanegem
You pl. (chi)ychwanegech
They (nhw)ychwanegent
Impersonalychwanegid

Preterite

Gorffennol

PersonForm
I (fi)ychwanegais
You sg. (ti)ychwanegaist
He/She (fe/hi)ychwanegodd
We (ni)ychwanegasom
You pl. (chi)ychwanegasoch
They (nhw)ychwanegasant
Impersonalychwanegwyd

Pluperfect

Gorberffaith

PersonForm
I (fi)ychwanegaswn
You sg. (ti)ychwanegasit
He/She (fe/hi)ychwanegasai
We (ni)ychwanegasem
You pl. (chi)ychwanegasech
They (nhw)ychwanegasent
Impersonalychwanegasid

Future

Dyfodol

PersonForm
I (fi)ychwanega i
You sg. (ti)ychwanegi di
He/She (fe/hi)hi o
We (ni)ychwanegwn ni
You pl. (chi)ychwanegwch chi
They (nhw)ychwanegant nhw

Conditional

Amodol

PersonForm
I (fi)ychwanegwn
You sg. (ti)ychwanegit
He/She (fe/hi)hi
We (ni)ychwanegem
You pl. (chi)ychwanegech
They (nhw)ychwanegent
Impersonalychwanegid

Imperative

Gorchmynnol

PersonForm
I (fi)-
You sg. (ti)ychwanega
He/She (fe/hi)ychwaneged
We (ni)ychwanegwn
You pl. (chi)ychwanegwch
They (nhw)ychwanegent
Impersonalychwaneger

Example sentences

Pan fydd gennym y Ddeddf, gallwn ychwanegu ati a'i diwygio yn y dyfodol.

Once we have the Act, we can add to it and amend it in the future.

B2

Rwyf eisoes yn gwybod yn fy rhanbarth i, Gogledd Cymru, bod datblygwyr, er enghraifft, sy'n gweithio ar draws y ffin eisoes yn dweud wrthyf fod ansicrwydd mewn polisi trethi datganoledig yn ychwanegu cymhlethdod at eu penderfyniadau.

I already know in my region, North Wales, that developers, for example, who are working across the border already tell me that uncertainty in devolved tax policy adds complexity to their decisions.

C1

Mae'r tymheredd gwleidyddol yn y wlad hon yn ddigon uchel eisoes; nid oes angen i chi ychwanegu tân at y fflamau.

The political temperature in this country is high enough already; it doesn't need you to add fire to the flames.

B2

Rydyn ni eisoes yn arwain y byd gyda ffermydd gwynt ar y môr, trwy Lywodraeth Geidwadol y DU efallai y dylwn i ei ychwanegu, a'r 14 mlynedd hynny yr ydych chi'n eu dilorni.

We're already leading the world with offshore wind, through the UK Conservative Government I might add, and that 14 years that you decry.

B2

Further reading

Welsh Verb Conjugation — All Tenses, Full Tables, Clear Patterns →The Welsh Verb Bod (To Be) — Every Form, Every Tense →Welsh Pronunciation — It's Actually Easier Than English →Best Apps to Learn Welsh (2026) →Browse all Welsh verb conjugations →

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Other Welsh verbs

euro

to gild

uno

to join

duo

to become black

mela

to gather nectar to make honey

dal

to catch

trio

to try

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