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Nightmare in Irish (Tromluí): Meaning, Pronunciation, Usage

The Irish for nightmare is tromluí, a masculine noun (plural tromluithe).
Updated October 2026Report a mistake

How to say “nightmare” in Irish

Irish:
tromluí
English:
nightmare
Word type:
noun
Gender:
masculine, fourth declension
Pronunciation:
“TROM-lee”  /ˈt̪ˠɾˠʊmˠl̪ˠiː/
Various forms
Plural:
tromluithe (nightmares)
Genitive singular:
tromluí, an tromluí (e.g. uafás an tromluí, the horror of the nightmare)
Genitive plural:
tromluithe, na dtromluithe (e.g. cúis na dtromluithe, the cause of the nightmares)

What does “tromluí” mean?

nightmare
A frightening, distressing dream, or a very unpleasant experience compared to one.Also: bad dream, incubus.

Other Irish words for nightmare: brionglóid (dream)

“Tromluí” with the article

The plural of nightmare in Irish is tromluithe. Here is tromluí after the article (an t-alt), in the singular and the plural.

an tromluí
the nightmare
No change after an
na tromluithe
the nightmares
Plural: no change after na

“Tromluí” in a sentence: Irish examples

Common Irish sentences using tromluí, the Irish word for nightmare.

Bhí tromluí agam aréir.
I had a nightmare last night.
Dhúisigh an páiste de bharr tromluí.
The child woke up because of a nightmare.
Bíonn tromluithe uirthi go minic.
She often has nightmares.
Ní cuimhin liom an tromluí ar maidin.
I can't remember the nightmare in the morning.
Ba thromluí ceart an turas sin.
That journey was a real nightmare.
I mo thromluí bhí mé ag titim.
In my nightmare I was falling.
Chuir an scannán tromluithe ar na páistí.
The film gave the children nightmares.

Other nouns in Irish

More everyday Irish nouns to learn next.

Nightmare in Irish: frequently asked questions

What is the Irish for nightmare?

The Irish for nightmare is tromluí (pronounced “TROM-lee”). It’s a masculine noun and the plural is tromluithe.

How do you pronounce tromluí in Irish?

Tromluí is said like “TROM-lee” (IPA /ˈt̪ˠɾˠʊmˠl̪ˠiː/).

What is the plural of nightmare in Irish?

The plural of tromluí is tromluithe; with the article, na tromluithe means “the nightmares”. The genitive plural is tromluithe, as in cúis na dtromluithe (the cause of the nightmares).

Why does tromluí change to thromluí or dtromluí?

Irish changes the start of some words after certain words. After mo (my) tromluí becomes mo thromluí (lenition), and after ár (our) or i (in) it becomes ár dtromluí (eclipsis).

How do I say I had a nightmare?

Say 'Bhí tromluí agam' or, more idiomatically, 'Bhí tromluí orm', since the nightmare is felt to weigh on you.

What is the difference between tromluí and brionglóid?

'Brionglóid' is any dream, while 'tromluí' (literally a heavy lying) is specifically a bad, frightening one.

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