HeyRua Get the app

Periodic in Irish (peiriadach): Meaning, Forms, Examples

Other uses of ‘peiriadach’: periodic (chemistry)

The Irish for periodic is peiriadach: tábla peiriadach, a periodic table.
Updated October 2026Report a mistake

How to say “periodic” in Irish

Irish:
peiriadach
English:
periodic, periodic (chemistry)
Word type:
adjective
More periodic:
níos peiriadaí
Most periodic:
is peiriadaí
Plural:
peiriadacha
Pronunciation:
“PEH-ree-ad-akh”  /ˈpʲɛɾʲiədˠəx/

What does “peiriadach” mean?

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

periodic
Happening again and again at regular intervals of time.Also: recurring, regular, cyclical.
1 other meaning: periodic (chemistry)
2periodic (chemistry)
Relating to the arrangement of chemical elements by their properties, as in the periodic table.Also: periodic, periodical.

Other Irish adjectives for periodic: séasúrach (seasonal)

“Peiriadach” after a noun

An Irish adjective comes after its noun. Here is peiriadach after tábla (table, masculine), after bean (woman, feminine) and after a plural.

after a masculine nountábla peiriadacha periodic table
after a feminine nounbean pheiriadacha periodic woman
after a plural nountáblaí peiriadachaperiodic tables

séimhiú (the h) the ending

feminine
beanwoman
+
peiriadachperiodic
=
bean pheiriadacha periodic woman

After a feminine noun the adjective gets a séimhiú, an h after its first letter: bean pheiriadach. After a masculine noun it stays as it is: tábla peiriadach.

plural
táblaítables
+
peiriadachaperiodic, plural
=
táblaí peiriadachaperiodic tables

With a plural noun the adjective takes its plural form, peiriadacha. It also gets an h after a plural that ends in a slender consonant; after other plurals it does not: mná peiriadacha.

More periodic, most periodic, very periodic

níosmore
+
peiriadaíperiodic
=
níos peiriadaímore periodic
ismost
+
peiriadaíperiodic
=
is peiriadaímost periodic

Tá an fheidhm seo níos peiriadaí ná an ceann eile. This function is more periodic than the other one.

more periodicníos peiriadaíin the past tense: ní ba pheiriadaí
most periodicis peiriadaíin the past tense: ba pheiriadaí
as periodic aschomh peiriadach leno change after chomh
very periodican-pheiriadachan- lenites, except d, t and s
too periodicrópheiriadachró- lenites

“Peiriadach” in a sentence: Irish examples

With a masculine noun, a feminine noun, a plural, a comparison and on its own.

Seo é an tábla peiriadach sa leabhar ceimice.
This is the periodic table in the chemistry book.
Bíonn athbhreithniú peiriadach ag an gcomhairle gach bliain.
The council holds a periodic review every year.
Rinneadh seiceálacha peiriadacha ar an trealamh.
Periodic checks were carried out on the equipment.
Tá an fheidhm seo níos peiriadaí ná an ceann eile.
This function is more periodic than the other one.
Tá an t-athrú sin peiriadach.
That change is periodic.

Other adjectives in Irish

More everyday Irish adjectives to learn next.

Periodic in Irish: frequently asked questions

What is the Irish for periodic?

The Irish for periodic is peiriadach (pronounced “PEH-ree-ad-akh”). It comes after the noun: tábla peiriadach, a periodic table; bean pheiriadach, a periodic woman.

How do you say more periodic and most periodic in Irish?

níos peiriadaí is more periodic and is peiriadaí is most periodic. In the past tense they become ní ba pheiriadaí and ba pheiriadaí.

Why does peiriadach become pheiriadach?

After a feminine singular noun an adjective is lenited: it gets an h after its first letter. So bean pheiriadach (a periodic woman) but tábla peiriadach (a periodic table), because tábla is masculine.

What is the plural of peiriadach?

With a plural noun peiriadach becomes peiriadacha: táblaí peiriadacha, mná peiriadacha.

How do you say very periodic in Irish?

an-pheiriadach. Too periodic is rópheiriadach, and as periodic as is chomh peiriadach le.

Does peiriadach have more than one meaning?

Yes. Peiriadach can mean periodic or periodic (chemistry), depending on context; the first is the most common.

What is the difference between 'peiriadach' and 'tréimhsiúil'?

'Tréimhsiúil' is the general word for periodic or periodical, as in 'iris thréimhsiúil', while 'peiriadach' is used mostly in science, as in 'an tábla peiriadach'.

Learn Irish by
actually speaking it

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

7-day free trial. Cancel anytime.

The HeyRua app home screen