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Booster in Irish (Treiseoir): Meaning, Pronunciation, Usage

‘treiseoir’ also means: strengthener

The Irish for booster is treiseoir, a masculine noun (plural treiseoirí).
Updated October 2026Report a mistake

How to say “booster” in Irish

Irish:
treiseoir
English:
booster, strengthener
Word type:
noun
Gender:
masculine
Pronunciation:
“TRESH-or”  /tʲɾʲɛʃoːɾʲ/
Various forms
Plural:
treiseoirí (boosters)
Genitive singular:
treiseora, an treiseora (e.g. cumhacht an treiseora, the power of the booster)
Genitive plural:
treiseoirí, na dtreiseoirí (e.g. cumhacht na dtreiseoirí, the power of the boosters)

What does “treiseoir” mean?

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

booster
A device that increases voltage, power or signal strength in an electrical or radio system.Also: signal booster, power booster, amplifier.
1 other meaning: strengthener
2strengthener
A person or thing that strengthens or supports something.Also: supporter, reinforcer.

“Treiseoir” with the article

The plural of booster in Irish is treiseoirí. Here is treiseoir after the article (an t-alt), in the singular and the plural.

an treiseoir
the booster
No change after an
na treiseoirí
the boosters
Plural: no change after na

“Treiseoir” in a sentence: Irish examples

Common Irish sentences using treiseoir, the Irish word for booster.

Cheannaigh mé treiseoir don raidió.
I bought a booster for the radio.
Tá an treiseoir briste arís.
The booster is broken again.
Las solas an treiseora go dearg.
The booster's light turned red.
Cuireadh treiseoirí nua ar an líonra.
New boosters were put on the network.
Níl mo threiseoir ag obair i gceart.
My booster isn't working properly.
Tá fadhb i dtreiseoir an chomharta.
There is a problem in the signal booster.
Chuir an teicneoir treiseoir sa teach.
The technician put a booster in the house.

Other nouns in Irish

More everyday Irish nouns to learn next.

Booster in Irish: frequently asked questions

What is the Irish for booster?

The Irish for booster is treiseoir (pronounced “TRESH-or”). It’s a masculine noun and the plural is treiseoirí. Depending on context it can also mean strengthener.

How do you pronounce treiseoir in Irish?

Treiseoir is said like “TRESH-or” (IPA /tʲɾʲɛʃoːɾʲ/).

What is the plural of booster in Irish?

The plural of treiseoir is treiseoirí; with the article, na treiseoirí means “the boosters”. The genitive plural is treiseoirí, as in cumhacht na dtreiseoirí (the power of the boosters).

Does treiseoir have more than one meaning?

Yes. Treiseoir can mean booster or strengthener, depending on context; the first is the most common.

Why does treiseoir change to threiseoir or dtreiseoir?

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

Is 'treiseoir' the same as 'aimplitheoir'?

Not quite: 'aimplitheoir' is the usual word for an audio amplifier, while 'treiseoir' is a booster that strengthens voltage or a signal.

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