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achosi

to cause

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

Present

Presennol

PersonForm
I (fi)achosaf
You sg. (ti)achosi
He/She (fe/hi)achos
We (ni)achoswn
You pl. (chi)achoswch
They (nhw)achosant
Impersonalachosir

Imperfect

Amherffaith

PersonForm
I (fi)achoswn
You sg. (ti)achosit
He/She (fe/hi)achosai
We (ni)achosem
You pl. (chi)achosech
They (nhw)achosent
Impersonalachosid

Preterite

Gorffennol

PersonForm
I (fi)achosais
You sg. (ti)achosaist
He/She (fe/hi)achosodd
We (ni)achosasom
You pl. (chi)achosasoch
They (nhw)achosasant
Impersonalachoswyd

Pluperfect

Gorberffaith

PersonForm
I (fi)achosaswn
You sg. (ti)achosasit
He/She (fe/hi)achosasai
We (ni)achosasem
You pl. (chi)achosasech
They (nhw)achosasent
Impersonalachosasid

Future

Dyfodol

PersonForm
I (fi)achosa i
You sg. (ti)achosi di
He/She (fe/hi)hi o
We (ni)achoswn ni
You pl. (chi)achoswch chi
They (nhw)achosant nhw

Conditional

Amodol

PersonForm
I (fi)achoswn
You sg. (ti)achosit
He/She (fe/hi)achosai
We (ni)achosem
You pl. (chi)achosech
They (nhw)achosent
Impersonalachosid

Imperative

Gorchmynnol

PersonForm
I (fi)-
You sg. (ti)achos
He/She (fe/hi)achosed
We (ni)achoswn
You pl. (chi)achoswch
They (nhw)achosent
Impersonalachoser

Example sentences

Beth sydd fel arfer yn achosi'r boen?

What usually causes the pain?

B1

Mae hyn wedi achosi pryder gwirioneddol yn lleol.

This has caused real concern locally.

B2

Felly, mae swyddogion safonau masnach yn defnyddio'r pwerau hynny i ymchwilio i'r rhai sy'n achosi colledion ariannol a gofid, ac i gymryd camau yn eu herbyn.

So, trading officers are using those powers to investigate and take action against those who cause financial loss and distress.

C1

O ran cynllunio, ymddengys fod problem fawr o ran cynlluniau datblygu lleol sydd wedi dyddio, ac mae hyn yn achosi problemau oherwydd bod cwmnïau adeiladu yn cael eu gadael yn teimlo'n ansicr iawn.

In terms of planning, there seems to be a major issue in terms of local development plans being out of date, and this causes problems because building companies are left in a state of uncertainty.

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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to join

duo

to become black

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dal

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trio

to try

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