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niweidio

to injure

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

Present

Presennol

PersonForm
I (fi)niweidiaf
You sg. (ti)niweidi
He/She (fe/hi)niweidio
We (ni)niweidiwn
You pl. (chi)niweidiwch
They (nhw)niweidiant
Impersonalniweidir

Imperfect

Amherffaith

PersonForm
I (fi)niweidiwn
You sg. (ti)niweidit
He/She (fe/hi)niweidiai
We (ni)niweidiem
You pl. (chi)niweidiech
They (nhw)niweidient
Impersonalniweidid

Preterite

Gorffennol

PersonForm
I (fi)niweidiais
You sg. (ti)niweidiaist
He/She (fe/hi)niweidiodd
We (ni)niweidiasom
You pl. (chi)niweidiasoch
They (nhw)niweidiasant
Impersonalniweidiwyd

Pluperfect

Gorberffaith

PersonForm
I (fi)niweidiaswn
You sg. (ti)niweidiasit
He/She (fe/hi)niweidiasai
We (ni)niweidiasem
You pl. (chi)niweidiasech
They (nhw)niweidiasent
Impersonalniweidiasid

Future

Dyfodol

PersonForm
I (fi)niweidia i
You sg. (ti)niweidi di
He/She (fe/hi)hi o
We (ni)niweidiwn ni
You pl. (chi)niweidiwch chi
They (nhw)niweidian nhw

Conditional

Amodol

PersonForm
I (fi)niweidiwn
You sg. (ti)niweidit
He/She (fe/hi)hi
We (ni)niweidiem
You pl. (chi)niweidiech
They (nhw)niweidient
Impersonalniweidid

Imperative

Gorchmynnol

PersonForm
I (fi)-
You sg. (ti)niweidi
He/She (fe/hi)niweidied
We (ni)niweidiwn
You pl. (chi)niweidiwch
They (nhw)niweidient
Impersonalniweidier

Example sentences

Yn gyntaf, gall newidiadau aml neu aneglur i gyfraith dreth niweidio hyder buddsoddwyr; maen nhw'n atal cynllunio tymor hir.

Firstly, frequent or unclear changes to tax law can damage investor confidence; they deter long-term planning.

C1

Po hiraf y caniateir iddo barhau, y mwyaf o gŵn fydd yn cael eu niweidio neu eu lladd.

The longer it's allowed to continue, the more dogs will be harmed or killed.

B2

Y cyntaf yw fy mod i'n berchen ar filgi a fu'n rasio yn y gorffennol, ac, yn amlwg, fe gollon ni Arthur, a oedd wedi'i niweidio'n benodol ac rydym ni'n gwybod ei fod wedi'i anafu trwy rasio milgwn.

The first is that I'm the owner of a former greyhound who raced, and, obviously, we lost Arthur, who was particularly damaged and we know was hurt through greyhound racing.

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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