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tystiolaethu

to testify

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

Present

Presennol

PersonForm
I (fi)tystiolaethaf
You sg. (ti)tystiolaethi
He/She (fe/hi)tystiolaetha
We (ni)tystiolaethwn
You pl. (chi)tystiolaethwch
They (nhw)tystiolaethant
Impersonaltystiolaethir

Imperfect

Amherffaith

PersonForm
I (fi)tystiolaethwn
You sg. (ti)tystiolaethit
He/She (fe/hi)tystiolaethai
We (ni)tystiolaethem
You pl. (chi)tystiolaethech
They (nhw)tystiolaethent
Impersonaltystiolaethid

Preterite

Gorffennol

PersonForm
I (fi)tystiolaethais
You sg. (ti)tystiolaethaist
He/She (fe/hi)tystiolaethodd
We (ni)tystiolaethasom
You pl. (chi)tystiolaethasoch
They (nhw)tystiolaethasant
Impersonaltystiolaethwyd

Pluperfect

Gorberffaith

PersonForm
I (fi)tystiolaethaswn
You sg. (ti)tystiolaethasit
He/She (fe/hi)tystiolaethasai
We (ni)tystiolaethasem
You pl. (chi)tystiolaethasech
They (nhw)tystiolaethasent
Impersonaltystiolaethasid

Future

Dyfodol

PersonForm
I (fi)tystiolaetha i
You sg. (ti)tystiolaethi di
He/She (fe/hi)hi o
We (ni)tystiolaethwn ni
You pl. (chi)tystiolaethwch chi
They (nhw)tystiolaethan nhw

Conditional

Amodol

PersonForm
I (fi)tystiolaethwn
You sg. (ti)tystiolaethit
He/She (fe/hi)hi
We (ni)tystiolaethem
You pl. (chi)tystiolaethech
They (nhw)tystiolaethent
Impersonaltystiolaethid

Imperative

Gorchmynnol

PersonForm
I (fi)-
You sg. (ti)tystiolaetha
He/She (fe/hi)tystiolaethed
We (ni)tystiolaethwn
You pl. (chi)tystiolaethwch
They (nhw)tystiolaethent
Impersonaltystiolaether

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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