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atgyfnerthu

to reinforce

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

Present

Presennol

PersonForm
I (fi)atgyfnerthaf
You sg. (ti)atgyfnerthi
He/She (fe/hi)atgyfnertha
We (ni)atgyfnerthwn
You pl. (chi)atgyfnerthwch
They (nhw)atgyfnerthant
Impersonalatgyfnerthir

Imperfect

Amherffaith

PersonForm
I (fi)atgyfnerthwn
You sg. (ti)atgyfnerthit
He/She (fe/hi)atgyfnerthai
We (ni)atgyfnerthem
You pl. (chi)atgyfnerthech
They (nhw)atgyfnerthent
Impersonalatgyfnerthid

Preterite

Gorffennol

PersonForm
I (fi)atgyfnerthais
You sg. (ti)atgyfnerthaist
He/She (fe/hi)atgyfnerthodd
We (ni)atgyfnerthasom
You pl. (chi)atgyfnerthasoch
They (nhw)atgyfnerthasant
Impersonalatgyfnerthwyd

Pluperfect

Gorberffaith

PersonForm
I (fi)atgyfnerthaswn
You sg. (ti)atgyfnerthasit
He/She (fe/hi)atgyfnerthasai
We (ni)atgyfnerthasem
You pl. (chi)atgyfnerthasech
They (nhw)atgyfnerthasent
Impersonalatgyfnerthasid

Future

Dyfodol

PersonForm
I (fi)atgyfnertha i
You sg. (ti)atgyfnerthi di
He/She (fe/hi)hi o
We (ni)atgyfnerthwn ni
You pl. (chi)atgyfnerthwch chi
They (nhw)atgyfnerthan nhw

Conditional

Amodol

PersonForm
I (fi)atgyfnerthwn
You sg. (ti)atgyfnerthit
He/She (fe/hi)hi
We (ni)atgyfnerthem
You pl. (chi)atgyfnerthech
They (nhw)atgyfnerthent
Impersonalatgyfnerthid

Imperative

Gorchmynnol

PersonForm
I (fi)-
You sg. (ti)atgyfnertha
He/She (fe/hi)atgyfnerthed
We (ni)atgyfnerthwn
You pl. (chi)atgyfnerthwch
They (nhw)atgyfnerthent
Impersonalatgyfnerther

Example sentences

Felly, Trefnydd, mae angen atgyfnerthu'r sector twristiaeth, nid ei reoleiddio ymhellach.

So, Trefnydd, the tourism sector needs reinforcement, not further regulation.

B1

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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