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arsyllu

to observe

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

Present

Presennol

PersonForm
I (fi)arsyllaf
You sg. (ti)arsylli
He/She (fe/hi)arsylla
We (ni)arsyllwn
You pl. (chi)arsyllwch
They (nhw)arsyllant
Impersonalarsyllir

Imperfect

Amherffaith

PersonForm
I (fi)arsyllwn
You sg. (ti)arsyllit
He/She (fe/hi)arsyllai
We (ni)arsyllem
You pl. (chi)arsyllech
They (nhw)arsyllent
Impersonalarsyllid

Preterite

Gorffennol

PersonForm
I (fi)arsyllais
You sg. (ti)arsyllaist
He/She (fe/hi)hi
We (ni)arsyllasom
You pl. (chi)arsyllasoch
They (nhw)arsyllasant
Impersonalarsyllwyd

Pluperfect

Gorberffaith

PersonForm
I (fi)arsyllaswn
You sg. (ti)arsyllasit
He/She (fe/hi)arsyllasai
We (ni)arsyllasem
You pl. (chi)arsyllasech
They (nhw)arsyllasent
Impersonalarsyllasid

Future

Dyfodol

PersonForm
I (fi)arsylla i
You sg. (ti)arsylli di
He/She (fe/hi)hi o
We (ni)arsyllwn ni
You pl. (chi)arsyllwch chi
They (nhw)arsyllan nhw

Conditional

Amodol

PersonForm
I (fi)arsyllwn
You sg. (ti)arsyllit
He/She (fe/hi)hi
We (ni)arsyllem
You pl. (chi)arsyllech
They (nhw)arsyllent
Impersonalarsyllid

Imperative

Gorchmynnol

PersonForm
I (fi)-
You sg. (ti)arsylla
He/She (fe/hi)arsylled
We (ni)arsyllwn
You pl. (chi)arsyllwch
They (nhw)arsyllent
Impersonalarsyller

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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