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trafferthu

to cause trouble

"trafferthu" means "to cause trouble" in Welsh. Full conjugation table with present, imperfect, preterite, future, conditional, and imperative tenses.

Present

Presennol

PersonForm
I (fi)trafferthaf
You sg. (ti)trafferthi
He/She (fe/hi)traffertha
We (ni)trafferthwn
You pl. (chi)trafferthwch
They (nhw)trafferthant
Impersonaltrafferthir

Imperfect

Amherffaith

PersonForm
I (fi)trafferthwn
You sg. (ti)trafferthit
He/She (fe/hi)trafferthai
We (ni)trafferthem
You pl. (chi)trafferthech
They (nhw)trafferthent
Impersonaltrafferthid

Preterite

Gorffennol

PersonForm
I (fi)trafferthais
You sg. (ti)trafferthaist
He/She (fe/hi)trafferthodd
We (ni)trafferthasom
You pl. (chi)trafferthasoch
They (nhw)trafferthasant
Impersonaltrafferthwyd

Pluperfect

Gorberffaith

PersonForm
I (fi)trafferthaswn
You sg. (ti)trafferthasit
He/She (fe/hi)trafferthasai
We (ni)trafferthasem
You pl. (chi)trafferthasech
They (nhw)trafferthasent
Impersonaltrafferthasid

Future

Dyfodol

PersonForm
I (fi)traffertha i
You sg. (ti)trafferthi di
He/She (fe/hi)hi o
We (ni)trafferthwn ni
You pl. (chi)trafferthwch chi
They (nhw)trafferthant nhw

Conditional

Amodol

PersonForm
I (fi)trafferthwn
You sg. (ti)trafferthit
He/She (fe/hi)hi
We (ni)trafferthem
You pl. (chi)trafferthech
They (nhw)trafferthent
Impersonaltrafferthid

Imperative

Gorchmynnol

PersonForm
I (fi)-
You sg. (ti)traffertha
He/She (fe/hi)trafferthed
We (ni)trafferthwn
You pl. (chi)trafferthwch
They (nhw)trafferthent
Impersonaltrafferther

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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