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tystio

to testify

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

Present

Presennol

PersonForm
I (fi)tystiaf
You sg. (ti)tysti
He/She (fe/hi)tystia
We (ni)tystiwn
You pl. (chi)tystiwch
They (nhw)tystiant
Impersonaltystir

Imperfect

Amherffaith

PersonForm
I (fi)tystiwn
You sg. (ti)tystit
He/She (fe/hi)tystiai
We (ni)tystiem
You pl. (chi)tystiech
They (nhw)tystient
Impersonaltystid

Preterite

Gorffennol

PersonForm
I (fi)tystiais
You sg. (ti)tystiaist
He/She (fe/hi)tystiodd
We (ni)tystiasom
You pl. (chi)tystiasoch
They (nhw)tystiasant
Impersonaltystiwyd

Pluperfect

Gorberffaith

PersonForm
I (fi)tystiaswn
You sg. (ti)tystiasit
He/She (fe/hi)tystiasai
We (ni)tystiasem
You pl. (chi)tystiasech
They (nhw)tystiasent
Impersonaltystiasid

Future

Dyfodol

PersonForm
I (fi)tystia i
You sg. (ti)tysti di
He/She (fe/hi)hi o
We (ni)tystiwn ni
You pl. (chi)tystiwch chi
They (nhw)tystian nhw

Conditional

Amodol

PersonForm
I (fi)tystiwn
You sg. (ti)tystit
He/She (fe/hi)hi
We (ni)tystiem
You pl. (chi)tystiech
They (nhw)tystient
Impersonaltystid

Imperative

Gorchmynnol

PersonForm
I (fi)-
You sg. (ti)tystia
He/She (fe/hi)tystied
We (ni)tystiwn
You pl. (chi)tystiwch
They (nhw)tystient
Impersonaltystier

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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