fallacious
/fəˈleɪ.ʃəs/adjective
fallacious is spelled F-A-L-L-A-C-I-O-U-S: 10 letters and 3 syllables. It appears about once in every 2 million words in written English, the 44,767th most frequent word form (wordfreq, 2021 data). As an adjective, fallacious means “Characterized by fallacy; false or mistaken” (English Wiktionary, September 2026).
How many letters and syllables are in fallacious?
| Letters | 10: F-A-L-L-A-C-I-O-U-S |
|---|---|
| Syllables | 3 (from its American pronunciation) |
| In writing | about once in every 2 million words; the 44,767th most frequent word form |
| Wrong spellings searched | none measured in search |
Sources: letters and syllables from the English Wiktionary's hyphenation or pronunciation and the CMU Pronouncing Dictionary; written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
How common is fallacious?
Fallacious appears about once in every 2 million words in written English, the 44,767th 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).
How do you pronounce fallacious?
- /fəˈleɪ.ʃəs/
Fallacious has 3 syllables (counted from its American pronunciation in the CMU Pronouncing Dictionary).
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Recordings: LL-Q1860_(eng)-Vininn126-fallacious.wav, Wikimedia Commons (author and licence on each file's page).
Forms of fallacious
- more fallacious comparative
- most fallacious superlative
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does fallacious mean?
The meanings the English Wiktionary records, quoted as written there (source below).
adjective
- 1
Characterized by fallacy; false or mistaken.
- 2
Deceptive or misleading.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Fallacious in Spanish, French, German and Portuguese
| Language | Words |
|---|---|
| French | fallacieux |
| Portuguese | falacioso , erróneo |
| Spanish | falaz |
| German | irreführend, trügerisch |
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 fallacious come from?
From Old French fallacieux (whence -acious), from Latin fallācia, from fallāx, from fallere.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).