Irrational

//ɪˈɹæʃ.(ə.)nəl//

Synonyms for "irrational" (229 found)

Ranked by relevance and common usage.

Closest matches (46)

Adjective(3 words)
absurdcockamamiecockeyed

Strong matches (69)

Noun(1 words)
irrational number

Related words (114)

madmaddenedmanicmazedmentalmentally deficientmeshuggahmindlessmisadvisedmisguidedmoon struckmoon-struckmyopicnegativeneuroticnon composnon compos mentisnonscientificnonsensicalnot all there
Show 89 more words
not brightnot followingnot rightnumeralnumerarynumerativenumericnumericaloddof little brainof unsound mindoffordinaloverenthusiasticoverreligiousoverzealouspairparalogicalpea brainedpea-brainedperfervidpin-brainedpositivepossibleprimepsychoqueerrabidradicalrationalravingrealreciprocalrecklessself-annullingself-contradictoryself-refutingsenselessshortsightedsicksillyslackmindedslackwittedsophisticstark-madstark-staring madstrangestupidsubmultiplesuperstitioussurdtetchedthoughtlesstouchedtranscendentalultrazealousunadvisedunauthenticunbalancedunconnectedunconsideredundiscerningunforeseeingungiftedunhingedunintellectualunintelligentunphilosophicalunreflectingunreflectiveunsaneunscientificunseeingunsensibleunsettledunsounduntalentedunthinkingunthoughtfulunwiseviolentwanderingwild eyedwild-eyedwild-lookingwithout reasonwithout rhyme or reasonwitlesszealotic

Related word relations

OpenGloss and ConceptNet supply richer edges like generalizations, collocations, and derivations.

7 relation types

More general

2 entries

Antonyms

2 entries

Synonyms

2 entries

derived

10 entries

has context

3 entries

related to

9 entries

similar

14 entries

Translations

90 translations across 38 languages.

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Ancient Greek

2 entries
  • ἄλογος adj (unfounded or nonsensical)
  • ἄρρητος adj (mathematics: of a number)

Armenian

2 entries
  • իռացիոնալ adj (unfounded or nonsensical)
  • իռացիոնալ adj (mathematics: of a number)

Asturian

1 entries
  • irracional adj (unfounded or nonsensical)

Bulgarian

4 entries
  • безразсъден adj (unfounded or nonsensical)
  • ирационален adj (mathematics: of a number)
  • неразумен adj (unfounded or nonsensical)
  • ирационално число noun (irrational number)

Catalan

3 entries
  • bèstia adj (unfounded or nonsensical)
  • irracional adj (unfounded or nonsensical)
  • irracional adj (mathematics: of a number)

Chinese Mandarin

2 entries
  • 不合理 adj (unfounded or nonsensical)
  • 無理數 /无理数 adj (mathematics: of a number)

Czech

1 entries
  • iracionální adj (mathematics: of a number)

Danish

2 entries
  • irrational adj (mathematics: of a number)
  • irrationel adj (unfounded or nonsensical)

Dutch

4 entries
  • irrationaal adj (mathematics: of a number)
  • irrationale adj (mathematics: of a number)
  • irrationeel adj (unfounded or nonsensical)
  • irrationele adj (unfounded or nonsensical)

Esperanto

2 entries
  • malracia adj (unfounded or nonsensical)
  • neracionala adj (mathematics: of a number)

Finnish

3 entries
  • epälooginen adj (unfounded or nonsensical)
  • irrationaalinen adj (unfounded or nonsensical)
  • irrationaalinen adj (mathematics: of a number)

French

2 entries
  • irrationnel adj (unfounded or nonsensical)
  • irrationnel adj (mathematics: of a number)

Galician

1 entries
  • irracional adj (unfounded or nonsensical)

German

4 entries
  • irrational adj (unfounded or nonsensical)
  • irrational adj (mathematics: of a number)
  • irrationell adj (unfounded or nonsensical)
  • unvernünftig adj (unfounded or nonsensical)

Greek

1 entries
  • άρρητος adj (mathematics: of a number)

Hindi

1 entries
  • अपरिमेय adj (mathematics: of a number)

Hungarian

3 entries
  • irracionális adj (unfounded or nonsensical)
  • irracionális adj (mathematics: of a number)
  • észszerűtlen adj (unfounded or nonsensical)

Icelandic

2 entries
  • óræður adj (mathematics: of a number)
  • óræð tala noun (irrational number)

Irish

1 entries
  • aingiallta adj (unfounded or nonsensical)

Italian

1 entries
  • irrazionale adj (unfounded or nonsensical)

Japanese

4 entries
  • ばかげた adj (unfounded or nonsensical)
  • 不合理な adj (unfounded or nonsensical)
  • 無理な adj (unfounded or nonsensical)
  • 無理数 adj (mathematics: of a number)

Korean

3 entries
  • 무리수 adj (mathematics: of a number)
  • 불합리한 adj (unfounded or nonsensical)
  • 무리수 noun (irrational number)

Macedonian

2 entries
  • безра́суден adj (unfounded or nonsensical)
  • нера́зумен adj (unfounded or nonsensical)

Manx

1 entries
  • neuresoonagh adj (unfounded or nonsensical)

Māori

2 entries
  • heahea adj (unfounded or nonsensical)
  • kewha adj (mathematics: of a number)

Norwegian Bokmål

2 entries
  • irrasjonal adj (mathematics: of a number)
  • irrasjonell adj (unfounded or nonsensical)

Norwegian Nynorsk

2 entries
  • irrasjonal adj (mathematics: of a number)
  • irrasjonell adj (unfounded or nonsensical)

Plautdietsch

1 entries
  • onveninftich adj (unfounded or nonsensical)

Polish

4 entries
  • irracjonalny adj (unfounded or nonsensical)
  • nieracjonalny adj (unfounded or nonsensical)
  • niewymierny adj (mathematics: of a number)
  • liczba niewymierna noun (irrational number)

Portuguese

2 entries
  • irracional adj (unfounded or nonsensical)
  • irracional adj (mathematics: of a number)

Romanian

2 entries
  • irațional adj (unfounded or nonsensical)
  • nerațional adj (unfounded or nonsensical)

Russian

3 entries
  • иррациона́льный adj (unfounded or nonsensical)
  • иррациона́льный adj (mathematics: of a number)
  • нерациона́льный adj (unfounded or nonsensical)

Serbo-Croatian

4 entries
  • nȅrazūman adj (unfounded or nonsensical)
  • ȉracionālan adj (unfounded or nonsensical)
  • и̏рациона̄лан adj (unfounded or nonsensical)
  • не̏разӯман adj (unfounded or nonsensical)

Spanish

1 entries
  • irracional adj (unfounded or nonsensical)

Swedish

2 entries
  • irrationell adj (unfounded or nonsensical)
  • irrationell adj (mathematics: of a number)

Tagalog

4 entries
  • atbang adj (unfounded or nonsensical)
  • ditagwayin adj (mathematics: of a number)
  • maatbang adj (unfounded or nonsensical)
  • bilang na ditagwayin noun (irrational number)

Telugu

1 entries
  • అసంబద్ధము adj (unfounded or nonsensical)

Vietnamese

2 entries
  • bất hợp lý adj (unfounded or nonsensical)
  • số vô tỉ adj (mathematics: of a number)

Sample sentences

14 total sentences available.

Tatoeba + Wiktionary

The irrational conversation continued.

Source: tatoeba (317936)

Clava loves all things irrational, and works at the kindergarten for precisely that reason.

Source: tatoeba (574198)

Religion, which should most distinguish us from the beasts, and ought most particularly elevate us, as rational creatures, above brutes, is that wherein men often appear most irrational, and more senseless than beasts.

Source: tatoeba (718745)

The time would fail me if I were to recite all the big names in history whose exploits are perfectly irrational and even shocking to the business mind.

Source: tatoeba (906644)

Showing 4 of 14 available sentences.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.