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Oxygen in Irish (Ocsaigin): Meaning, Pronunciation, Usage

The Irish for oxygen is ocsaigin, a feminine noun.
Updated October 2026Report a mistake

How to say “oxygen” in Irish

Irish:
ocsaigin
English:
oxygen
Word type:
noun
Gender:
feminine, second declension
Pronunciation:
“OK-suh-gin”  /ˈɔksəɟɪnʲ/
Various forms
Genitive singular:
ocsaigine, na hocsaigine (e.g. easpa ocsaigine, lack of oxygen)

What does “ocsaigin” mean?

oxygen
A colourless gas in the air that people, animals and plants need to live; chemical element number 8.Also: o2, oxygen gas.

“Ocsaigin” with the article

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

an ocsaigin
the oxygen
No change: feminine nouns starting with a vowel keep their form after an

“Ocsaigin” in a sentence: Irish examples

Common Irish sentences using ocsaigin, the Irish word for oxygen.

Tá ocsaigin ag teastáil uainn chun maireachtáil.
We need oxygen to live.
Táirgeann plandaí ocsaigin le linn an lae.
Plants produce oxygen during the day.
Cuireadh ar ocsaigin é san ospidéal.
He was put on oxygen in the hospital.
Bhí an ocsaigin gann ar bharr an tsléibhe.
Oxygen was scarce at the top of the mountain.
Tá leibhéal na hocsaigine ina fhuil íseal.
The oxygen level in his blood is low.
Bhí sorcóir ocsaigine ar a dhroim ag an tumadóir.
The diver had an oxygen cylinder on his back.
Tá níos lú ocsaigine san uisce te.
There is less oxygen in warm water.

Other nouns in Irish

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Oxygen in Irish: frequently asked questions

What is the Irish for oxygen?

The Irish for oxygen is ocsaigin (pronounced “OK-suh-gin”). It’s a feminine noun.

How do you pronounce ocsaigin in Irish?

Ocsaigin is said like “OK-suh-gin” (IPA /ˈɔksəɟɪnʲ/).

Does ocsaigin have a plural?

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

Why does ocsaigin sometimes have a t or h in front of it?

Irish nouns beginning with a vowel take a prefix after certain words: an ocsaigin (the oxygen), a hocsaigin (her oxygen), a n-ocsaigin (their oxygen).

How do you say 'oxygen mask' in Irish?

An oxygen mask is 'masc ocsaigine', using the genitive 'ocsaigine'.

Is 'ocsaigin' used with the article?

Usually it is used without the article in general statements, for example 'Tá ocsaigin san aer', but the article appears when referring to specific oxygen: 'leibhéal na hocsaigine'.

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