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Plane in Irish (plánach): Meaning, Forms, Examples

The Irish for plane is plánach: dromchla plánach, a plane surface.
Updated October 2026Report a mistake

How to say “plane” in Irish

Irish:
plánach
English:
plane
Word type:
adjective
Planer:
níos plánaí
Planest:
is plánaí
Plural:
plánacha
Pronunciation:
“PLAW-nuhkh”  /ˈpl̪ˠɑːn̪ˠəx/

What does “plánach” mean?

plane
Flat and level, lying in a single plane, used mainly in mathematics and technical language.Also: planar, flat, level.

“Plánach” after a noun

An Irish adjective comes after its noun. Here is plánach after dromchla (surface, masculine), after bean (woman, feminine) and after a plural.

after a masculine noundromchla plánacha plane surface
after a feminine nounbean phlánacha plane woman
after a plural noundromchlaí plánachaplane surfaces

séimhiú (the h) the ending

feminine
beanwoman
+
plánachplane
=
bean phlánacha plane woman

After a feminine noun the adjective gets a séimhiú, an h after its first letter: bean phlánach. After a masculine noun it stays as it is: dromchla plánach.

plural
dromchlaísurfaces
+
plánachaplane, plural
=
dromchlaí plánachaplane surfaces

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

Planer, planest, very plane

níosmore
+
plánaíplane
=
níos plánaíplaner
ismost
+
plánaíplane
=
is plánaíplanest

Tá an taobh seo níos plánaí ná an taobh eile. This side is flatter than the other side.

planerníos plánaíin the past tense: ní ba phlánaí
planestis plánaíin the past tense: ba phlánaí
as plane aschomh plánach leno change after chomh
very planean-phlánachan- lenites, except d, t and s
too planeróphlánachró- lenites

“Plánach” in a sentence: Irish examples

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

Is dromchla plánach é seo.
This is a plane surface.
Tarraing figiúr plánach ar an leathanach.
Draw a plane figure on the page.
Déanaimid staidéar ar chruthanna plánacha sa rang.
We study plane shapes in class.
Tá an taobh seo níos plánaí ná an taobh eile.
This side is flatter than the other side.
Tá an dromchla plánach.
The surface is plane.

Other adjectives in Irish

More everyday Irish adjectives to learn next.

Plane in Irish: frequently asked questions

What is the Irish for plane?

The Irish for plane is plánach (pronounced “PLAW-nuhkh”). It comes after the noun: dromchla plánach, a plane surface; bean phlánach, a plane woman.

How do you say planer and planest in Irish?

níos plánaí is planer and is plánaí is planest. In the past tense they become ní ba phlánaí and ba phlánaí.

Why does plánach become phlánach?

After a feminine singular noun an adjective is lenited: it gets an h after its first letter. So bean phlánach (a plane woman) but dromchla plánach (a plane surface), because dromchla is masculine.

What is the plural of plánach?

With a plural noun plánach becomes plánacha: dromchlaí plánacha, mná plánacha.

How do you say very plane in Irish?

an-phlánach. Too plane is róphlánach, and as plane as is chomh plánach le.

Is 'plánach' the everyday word for flat?

No, 'plánach' is mainly technical, as in 'céimseata phlánach'. For everyday flatness use 'cothrom' or 'réidh'.

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