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treiddio

to penetrate

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

Present

Presennol

PersonForm
I (fi)treiddiaf
You sg. (ti)treiddi
He/She (fe/hi)treiddio
We (ni)treiddiwn
You pl. (chi)treiddiwch
They (nhw)treiddiant
Impersonaltreiddir

Imperfect

Amherffaith

PersonForm
I (fi)treiddiwn
You sg. (ti)treiddit
He/She (fe/hi)treiddiai
We (ni)treiddiem
You pl. (chi)treiddiech
They (nhw)treiddient
Impersonaltreiddid

Preterite

Gorffennol

PersonForm
I (fi)treiddiais
You sg. (ti)treiddiaist
He/She (fe/hi)treiddiodd
We (ni)treiddiasom
You pl. (chi)treiddiasoch
They (nhw)treiddiasant
Impersonaltreiddiwyd

Pluperfect

Gorberffaith

PersonForm
I (fi)treiddiaswn
You sg. (ti)treiddiasit
He/She (fe/hi)treiddiasai
We (ni)treiddiasem
You pl. (chi)treiddiasech
They (nhw)treiddiasent
Impersonaltreiddiasid

Future

Dyfodol

PersonForm
I (fi)treiddiaf i
You sg. (ti)treiddi di
He/She (fe/hi)hi o
We (ni)treiddiwn ni
You pl. (chi)treiddiwch chi
They (nhw)treiddian nhw

Conditional

Amodol

PersonForm
I (fi)treiddiwn
You sg. (ti)treiddit
He/She (fe/hi)hi
We (ni)treiddiem
You pl. (chi)treiddiech
They (nhw)treiddient
Impersonaltreiddid

Imperative

Gorchmynnol

PersonForm
I (fi)-
You sg. (ti)treiddia
He/She (fe/hi)treiddied
We (ni)treiddiwn
You pl. (chi)treiddiwch
They (nhw)treiddient
Impersonaltreiddier

Example sentences

Ond y cwestiwn, felly, ydy: i ba raddau ydy'r egwyddorion yma, sydd ymhlyg yn y Ddeddf amaeth, yn treiddio i mewn i'r cynllun a gyflwynwyd i'r wlad ddoe?

But the question, then, is: to what extent are these principles, which are implicit in the agriculture Act, permeating into the scheme put forward to the nation yesterday?

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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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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