irracional

Albanian

Adjective

irracionál (feminine irracionale)

1. irrational

   Synonym: filiz

Further reading

• “irracional”, in FGJSH: Fjalor i gjuhës shqipe [Dictionary of the Albanian language] (in Albanian), 2006

Asturian

Alternative forms

• inracional

Etymology

From Latin irratiōnālis.

Pronunciation

• IPA^(key): /iraθjoˈnal/ [i.ra.θjoˈnal]
• Rhymes: -al
• Syllabification: i‧rra‧cio‧nal

Adjective

irracional (epicene, plural irracionales)

1. irrational (unfounded or nonsensical)

Further reading

• García Arias, Xosé Lluis (2002–2004), “irracional”, in Diccionario general de la lengua asturiana [General Dictionary of the Asturian Language] (overall work in Spanish), Editorial Prensa Asturiana, →ISBN
• “irracional”, in Diccionariu de la llingua asturiana [Dictionary of the Asturian Language] (in Asturian), 1st edition, Academy of the Asturian Language [Asturian: Academia de la Llingua Asturiana], 2000, →ISBN

Catalan

Etymology

Borrowed from Latin irratiōnālis.

Pronunciation

• IPA^(key): (Northern, Central) [i.rə.si.uˈnal]
• IPA^(key): (Balearic) [i.rə.si.oˈnal]
• IPA^(key): (Valencia, Northwestern) [i.ra.si.oˈnal]

• Audio (Barcelona):

  (file)

• Rhymes: -al
• Hyphenation: ir‧ra‧ci‧o‧nal

Adjective

irracional m or f (masculine and feminine plural irracionals)

1. irrational

   Antonym: racional

Derived terms

• irracionalitat
• irracionalment
• nombre irracional

Further reading

• “irracional”, in Diccionari de la llengua catalana [Dictionary of the Catalan Language] (in Catalan), second edition, Institute of Catalan Studies [Catalan: Institut d'Estudis Catalans], April 2007

Galician

Etymology

From Latin irratiōnālis.

Pronunciation

 

• IPA^(key): /iraθjoˈnal/ [i.ra.θjoˈnɑɫ]

• IPA^(key): (standard) /iraθjoˈnal/ [i.ra.θjoˈnɑɫ]
• IPA^(key): (seseo) /irasjoˈnal/ [i.ra.sjoˈnɑɫ]

• Rhymes: -al
• Hyphenation: i‧rra‧cio‧nal

Adjective

irracional m or f (plural irracionais)

1. irrational, absurd

   Antonym: racional

Derived terms

• irracionalidade
• irracionalmente

Further reading

• “irracional”, in Dicionario da Real Academia Galega (in Galician), A Coruña: Royal Galician Academy, 2012–2026

Portuguese

Etymology

Etymology tree

Proto-Indo-European *né

Proto-Indo-European *n̥-

Proto-Italic *n̥-

Latin in-

Proto-Indo-European *h₂er-

Proto-Indo-European *-éh₁ti

Proto-Indo-European *h₂reh₁-

Proto-Italic *rēōr

Latin reor

Latin ratus

Proto-Indo-European *-tis

Proto-Indo-European *-Hō

Proto-Indo-European *-tiHō

Proto-Italic *-tiō

Latin -tiō

Latin ratiō

Proto-Indo-European *h₂el-der.?

Proto-Italic *-ālis

Latin -ālis

Latin ratiōnālis

Latin irratiōnālisbor.

Portuguese irracional

Borrowed from Latin irratiōnālis. By surface analysis, ir- +‎ racional.

Pronunciation

 

• (Brazil) IPA^(key): /i.ʁa.si.oˈnaw/ [i.ha.sɪ.oˈnaʊ̯], (faster pronunciation) /i.ʁa.sjoˈnaw/ [i.ha.sjoˈnaʊ̯]

• (Brazil) IPA^(key): /i.ʁa.si.oˈnaw/ [i.ha.sɪ.oˈnaʊ̯], (faster pronunciation) /i.ʁa.sjoˈnaw/ [i.ha.sjoˈnaʊ̯]
  • (Rio de Janeiro) IPA^(key): /i.ʁa.si.oˈnaw/ [i.χa.sɪ.oˈnaʊ̯], (faster pronunciation) /i.ʁa.sjoˈnaw/ [i.χa.sjoˈnaʊ̯]

 

• (Portugal) IPA^(key): /i.ʁɐ.sjuˈnal/ [i.ʁɐ.sjuˈnaɫ]

• (Portugal) IPA^(key): /i.ʁɐ.sjuˈnal/ [i.ʁɐ.sjuˈnaɫ]
  • (Southern Portugal) IPA^(key): /i.ʁɐ.sjuˈna.li/

• Rhymes: (Portugal) -al, (Brazil) -aw
• Hyphenation: ir‧ra‧ci‧o‧nal

Adjective

irracional m or f (plural irracionais, comparable, comparative mais irracional, superlative o mais irracional or irracionalíssimo)

1. (comparable) not rational; irrational; unfounded; nonsensical; absurd
2. (not comparable, of a living being) that is of a non-human species, thus inherently not rational; nonhuman and irrational
3. (not comparable, of a real number) that cannot be written as the ratio of two integers

Derived terms

• irracionalidade
• irracionalmente

Further reading

• “irracional”, in Dicionário Priberam da Língua Portuguesa (in Portuguese), Lisbon: Priberam, 2008–2026

Spanish

Etymology

From Latin irratiōnālis.

Pronunciation

• IPA^(key): /iraθjoˈnal/ [i.ra.θjoˈnal] (Equatorial Guinea, Spain)
• IPA^(key): /irasjoˈnal/ [i.ra.sjoˈnal] (Latin America, Philippines)
• Rhymes: -al
• Syllabification: i‧rra‧cio‧nal

Adjective

irracional m or f (masculine and feminine plural irracionales)

1. irrational, absurd

   Antonym: racional

Derived terms

• irracionalidad
• irracionalismo
• irracionalmente
• número irracional

Further reading

• “irracional”, in Diccionario de la lengua española [Dictionary of the Spanish Language] (in Spanish), online version 23.8.1, Royal Spanish Academy [Spanish: Real Academia Española], 15 December 2025