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sylwi

to observe

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

Present

Presennol

PersonForm
I (fi)sylwaf
You sg. (ti)sylwi
He/She (fe/hi)sylwa
We (ni)sylwn
You pl. (chi)sylwch
They (nhw)sylwant
Impersonalsylwir

Imperfect

Amherffaith

PersonForm
I (fi)sylwn
You sg. (ti)sylwit
He/She (fe/hi)sylwai
We (ni)sylwem
You pl. (chi)sylwech
They (nhw)sylwent
Impersonalsylwid

Preterite

Gorffennol

PersonForm
I (fi)sylwais
You sg. (ti)sylwaist
He/She (fe/hi)sylwodd
We (ni)sylwsom
You pl. (chi)sylwsoch
They (nhw)sylwsant
Impersonalsylwyd

Pluperfect

Gorberffaith

PersonForm
I (fi)sylwswn
You sg. (ti)sylwsit
He/She (fe/hi)sylwsai
We (ni)sylwsem
You pl. (chi)sylwsech
They (nhw)sylwsent
Impersonalsylwsid

Future

Dyfodol

PersonForm
I (fi)sylwa i
You sg. (ti)sylwi di
He/She (fe/hi)hi o
We (ni)sylwn ni
You pl. (chi)sylwch chi
They (nhw)sylwan nhw

Conditional

Amodol

PersonForm
I (fi)sylwn
You sg. (ti)sylwit
He/She (fe/hi)hi
We (ni)sylwem
You pl. (chi)sylwech
They (nhw)sylwent
Impersonalsylwid

Imperative

Gorchmynnol

PersonForm
I (fi)-
You sg. (ti)sylwa
He/She (fe/hi)sylwed
We (ni)sylwn
You pl. (chi)sylwch
They (nhw)sylwent
Impersonalsylwer

Example sentences

Rwy'n sylwi, dros y ffin yn Lloegr, fod dangosfwrdd sy'n cyhoeddi data byw ar ôl ychydig wythnosau'n unig, fel y gall pobl, gan gynnwys ysgolion eu hunain, gymharu eu hunain â'u cymheiriaid.

I notice that, over the border in England, there is a dashboard that publishes live data in arrears by just a few weeks, so that people, including schools themselves, can compare themselves with their peers.

C1

Nid oeddwn wedi sylwi.

I hadn't noticed.

C1

Rwy'n sylwi bod yna siroedd eraill ledled Cymru sydd ar hyn o bryd heb safleoedd awdurdodedig o gwbl.

I notice that there are other counties across Wales that currently have no authorised sites at all.

B2

Fe wnaethom ni sylwi bod yna enghreifftiau, er enghraifft, Swindon, lle bu pwysau ar elusennau lles anifeiliaid.

We noticed that there are examples, for example, Swindon, where there's been pressure on animal welfare charities.

B2

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 →

Practise "sylwi" with spaced repetition

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Other Welsh verbs

euro

to gild

uno

to join

duo

to become black

mela

to gather nectar to make honey

dal

to catch

trio

to try

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