Overview

Numbers in Irish, known as na huimhreacha, are a fundamental part of the language. They are used for counting, ordering, and describing quantities. Irish has several distinct systems for numbers, and the forms often change depending on what is being counted. Understanding these systems is essential for everyday communication.

This section covers the three main types of numbers you will encounter:

1. Cardinal Numbers: For counting things (e.g., “one book”, “two cats”).
2. Ordinal Numbers: For indicating position or rank (e.g., “the first day”, “the second prize”).
3. Personal Numbers: Special forms used specifically for counting people (e.g., “two people”, “three men”).

Cardinal Numbers

Cardinal numbers are used for general counting. Irish has two systems: a traditional system based on twenties (vigesimal) and a modern decimal system. The decimal system is now more common, especially in education and official contexts.

The form of a cardinal number changes depending on its use:

• Disjunctive/Abstract Counting: When counting in sequence, like “one, two, three…”.
• Conjunctive/Counting Nouns: When counting a specific noun, like “one house”, “two cars”. These forms often cause mutations on the noun that follows.

For example, the number “one” is a haon when counting abstractly, but aon teach amháin when counting “one house”.

Ordinal Numbers

Ordinal numbers indicate order or sequence, such as “first”, “second”, and “third”. They are commonly used for dates, rankings, and floors in a building. Most ordinal numbers cause lenition on the following noun.

• an chéad lá - the first day
• an dara háit - the second place
• an tríú huair - the third time

Personal Numbers

Irish uses a special set of numbers for counting people from two to twelve. These are known as personal numbers or human numerals. Instead of using the standard cardinal number followed by the word for “people” (daoine), a single, distinct word is used.

• beirt - two people
• triúr - three people
• ceathrar - four people

These forms are very common in everyday speech. For example, to say “I saw three men”, you would use the personal number triúr.

• Chonaic mé triúr fear - I saw three men.