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unreason

noun, verb

unreason is spelled U-N-R-E-A-S-O-N: 8 letters. It appears about once in every 15 million words in written English, the 117,098th most frequent word form (wordfreq, 2021 data). As a noun, unreason means “Lack of reason or rationality; unreasonableness; irrationality” (English Wiktionary, September 2026). The plural of unreason is unreasons.

How many letters and syllables are in unreason?

Letters8: U-N-R-E-A-S-O-N
In writingabout once in every 15 million words; the 117,098th most frequent word form
Wrong spellings searchednone measured in search

Sources: letters and syllables from the English Wiktionary's hyphenation or pronunciation; written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).

How common is unreason?

Unreason appears about once in every 15 million words in written English, the 117,098th most frequent word form in the list.

Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).

Forms of unreason

  • unreasons plural, present, singular, he/she/it
  • unreasoning participle, present
  • unreasoned participle, past

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).

What does unreason mean?

The meanings the English Wiktionary records, quoted as written there (source below).

noun

  1. 1

    Lack of reason or rationality; unreasonableness; irrationality.

  2. 2

    Nonsense; folly; absurdity.

verb

  1. 1

    rareTo prove to be unreasonable; disprove by argument.

  2. 2

    rareTo apply false logic or think without logic.

  3. 3

    rareTo make unreasonable; to deprive of reason.

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).

Unreason in Spanish, French, German and Portuguese

LanguageWords
GermanUnvernunft (lack of reason), Torheit (nonsense, folly)
Frenchdéraison (nonsense, folly)

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Translations are Wiktionary's, by sense; a linked word has its own PlainSpell page.

Where does unreason come from?

From Middle English unreson; equivalent to un- + reason.

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).

What to look up after unreason