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costio

to cost

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

Present

Presennol

PersonForm
I (fi)costiaf
You sg. (ti)costi
He/She (fe/hi)costio
We (ni)costiwn
You pl. (chi)costiwch
They (nhw)costiant
Impersonalcostir

Imperfect

Amherffaith

PersonForm
I (fi)costiwn
You sg. (ti)costit
He/She (fe/hi)costiai
We (ni)costiem
You pl. (chi)costiech
They (nhw)costient
Impersonalcostid

Preterite

Gorffennol

PersonForm
I (fi)costiais
You sg. (ti)costiaist
He/She (fe/hi)costiodd
We (ni)costiasom
You pl. (chi)costiasoch
They (nhw)costiasant
Impersonalcostiwyd

Pluperfect

Gorberffaith

PersonForm
I (fi)costiaswn
You sg. (ti)costiasit
He/She (fe/hi)costiasai
We (ni)costiasem
You pl. (chi)costiasech
They (nhw)costiasent
Impersonalcostiasid

Future

Dyfodol

PersonForm
I (fi)costia i
You sg. (ti)costi di
He/She (fe/hi)hi o
We (ni)costiwn ni
You pl. (chi)costiwch chi
They (nhw)costian nhw

Conditional

Amodol

PersonForm
I (fi)costiwn
You sg. (ti)costit
He/She (fe/hi)costiai
We (ni)costiem
You pl. (chi)costiech
They (nhw)costient
Impersonalcostid

Imperative

Gorchmynnol

PersonForm
I (fi)-
You sg. (ti)costia
He/She (fe/hi)costied
We (ni)costiwn
You pl. (chi)costiwch
They (nhw)costient
Impersonalcostier

Example sentences

Mae cyngor Abertawe wedi dweud y byddai’n costio tua £65,000 fesul eiddo i gyrraedd y safon yma, sy’n creu cyfanswm anferth o gannoedd o filiynau o bunnoedd, a hynny i un cyngor yn unig.

Swansea council has said that it would cost about £65,000 per property to reach that standard, which creates a huge sum of hundreds of millions of pounds, and that for just one council alone.

C1

Rydyn ni'n gwybod bod darparu'r gwasanaeth diwedd oes a hosbis yna yn y bwrdd iechyd yn costio mwy, ar ddiwedd y dydd.

We know that providing end-of-life and hospice services in the health board costs more at the end of the day.

B2

Ond mae yna fater difrifol ynglŷn â chost a chynaliadwyedd cyffuriau lefel isel—cyffuriau fel Aspirin, ibuprofen a pharasetamol—sydd yn costio miliynau o bunnoedd i'r GIG bob blwyddyn.

But there is a serious issue about the cost and sustainability of low-level drugs—drugs such as Aspirin, ibuprofen and paracetamol—which do cost the NHS millions of pounds every year.

C1

Felly, ym Manceinion, mae symud i'r model y mae'r Llywodraeth yn ei ddilyn wedi costio £100 miliwn yn fwy.

So, in Manchester, moving to the model that the Government is pursuing has cost £100 million more.

C1

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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to join

duo

to become black

mela

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dal

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trio

to try

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