HeyRua Get the app

Illumination in Irish (Soilsiú): Meaning, Pronunciation, Usage

‘soilsiú’ also means: enlightenment

The Irish for illumination is soilsiú, a masculine noun. Ag soilsiú is lighting up, from the verb soilsigh.
Updated October 2026Report a mistake

How to say “illumination” in Irish

Irish:
soilsiú
English:
illumination, enlightenment
Word type:
noun (verbal noun)
Verbal noun of:
soilsigh, to light up (ag soilsiú, lighting up)
Gender:
masculine, fourth declension
Pronunciation:
“sil-SHOO”  /sˠɪlʲˈʃuː/
Various forms
Genitive singular:
soilsithe, an tsoilsithe (e.g. córas an tsoilsithe, the lighting system)

What does “soilsiú” mean?

“Soilsiú” has two alternative meanings. The most common comes first.

illumination
The act of lighting something up or giving it light; the verbal noun of the verb soilsigh.Also: lighting, shining, lighting up.
1 other meaning: enlightenment
2enlightenment
Clarity of mind or spiritual understanding, as when someone is enlightened.Also: clarification, understanding.

“Soilsiú” as a verbal noun

After ag, soilsiú means lighting up: it is the verbal noun of the verb soilsigh (to light up). A noun that follows it goes into the genitive.

agat
+
soilsiúverbal noun
=
ag soilsiúlighting up

“Soilsiú” with the article

Here is soilsiú after the article (an t-alt).

an soilsiú
the illumination
No change after an

“Soilsiú” in a sentence: Irish examples

Common Irish sentences using soilsiú, the Irish word for illumination.

Tá soilsiú maith sa seomra seo.
This room has good lighting.
Bhí an soilsiú sa halla an-lag.
The lighting in the hall was very weak.
D'ardaigh costas an tsoilsithe arís i mbliana.
The cost of lighting went up again this year.
Tá siad ag obair ar shoilsiú na sráide.
They are working on the street lighting.
Ní maith liom an soilsiú i mo sheomra leapa.
I don't like the lighting in my bedroom.
Fuair an manach soilsiú tar éis blianta machnaimh.
The monk attained enlightenment after years of meditation.
Bíonn soilsiú speisialta ar an gcaisleán san oíche.
The castle has special illumination at night.

Other nouns in Irish

More everyday Irish nouns to learn next.

Illumination in Irish: frequently asked questions

What is the Irish for illumination?

The Irish for illumination is soilsiú (pronounced “sil-SHOO”). It’s a masculine noun. Depending on context it can also mean enlightenment.

How do you pronounce soilsiú in Irish?

Soilsiú is said like “sil-SHOO” (IPA /sˠɪlʲˈʃuː/).

Does soilsiú have a plural?

No plural form is given for soilsiú in the standard. Many abstract and mass nouns in Irish have no plural.

Does soilsiú have more than one meaning?

Yes. Soilsiú can mean illumination or enlightenment, depending on context; the first is the most common.

Why does soilsiú change to shoilsiú?

After words like mo (my) and do (your) the first letter is lenited: mo shoilsiú. After ár (our) it stays ár soilsiú, because s does not take eclipsis.

What is the difference between soilsiú and solas?

Solas is light itself, while soilsiú is lighting or illumination, the act or arrangement of providing light, e.g. soilsiú an tseomra, the lighting of the room.

Learn Irish by
actually speaking it

Learn everyday Irish words like soilsiú through guided conversation with Rua.

7-day free trial. Cancel anytime.

The HeyRua app home screen