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effeithio

to affect

VerbA2/ɛˈfei̯θjɔ/

"effeithio" means "to affect" in Welsh (verb). Pronounced /ɛˈfei̯θjɔ/. Mutation forms: Treiglad Llaes → heffeithio.

Mutation forms

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

MutationForm
Base formeffeithio
Treiglad Llaesheffeithio

"effeithio" in context

Pa gyngor ffurfiol sydd wedi cael ei roi iddyn nhw o ran lefel setliad tebygol, er mwyn iddyn nhw allu mynd ati i wneud penderfyniadau fydd yn effeithio ar wasanaethau rheng flaen?

What formal advice has been provided to them in terms of the likely settlement level so that they can start to make decisions that will have an impact on front-line services?

C1

Mae hyn yn amlwg yn straen enfawr ar gyllidebau cynghorau ac yn ei dro, fe fydd yn effeithio'n sylweddol ar wasanaethau lleol.

This clearly is a huge strain on council budgets and, in turn, will drastically affect local services.

B2

Nawr, rwy'n deall bod prosiect Ysgol Bro Ogwr wedi cael ei ohirio oherwydd materion ecolegol sy'n effeithio ar safle Ffordd Cadfan, ac mae hynny wedi arwain at oedi gydag archwilio'r safle.

Now, I understand that the Ysgol Bro Ogwr project has been delayed due to ecological issues affecting the Ffordd Cadfan site, and that's resulted in a delay with site investigation.

C1

Mae'r grŵp yn cynnwys y tri awdurdod lleol nad oes ganddynt ysgol, ond hefyd yr awdurdodau lleol—Casnewydd, Torfaen, Rhondda Cynon Taf, a Phowys—y gallai hynny effeithio arnynt hefyd.

The group consists of the three local authorities that don’t have a school, but also the local authorities—Newport, Torfaen, Rhondda Cynon Taf, and Powys—that might be affected by that, as well.

C1

Mae cwmnïau gweithredu trenau a chwmnïau gweithredu rheilffyrdd yn cydweithio i asesu sut y bydd newid hinsawdd yn effeithio ar y DU yn y blynyddoedd i ddod.

Train operating companies and rail operating companies are working together to assess how climate change will impact the UK in the years to come.

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

agor

to open

cynnwys

to permit

chwilio

to find

dal

to hold

defnyddio

to use

ffurfio

to form

nhau

to clean

rhoi

to put

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