fallacy — a mistaken belief, especially one based on unsound argument
Part of speech: NOUN
Definition: a mistaken belief, especially one based on unsound argument
Pronunciation (IPA): /ˈfæləsi/
Example Sentences
- The student's argument contained a major fallacy that made his entire essay collapse.
- My mom's fallacy is believing that turning off the wifi will make me study harder.
- It's a dangerous fallacy to assume that expensive means better quality.
fallacy
NOUN[/ˈfæləsi/]
a mistaken belief, especially one based on unsound argument

Confidently stepping onto the broken bridge was a dangerous fallacy.

FALL(drop) + ACY(state) — following the flawed map led to a sudden FALL, proving his logic was a fallacy.

Thinking a cardboard box could reach the galaxy was a beautiful but obvious fallacy.
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🎤Pronunciation
🌳Etymology
Origin
From Latin 'fallacia' meaning deception or deceitfulness, derived from 'fallax' (deceptive) and the root 'fallere' (to deceive or fail).
Breakdown
fall- (to deceive, fail) + -acy (state or quality of) = fallacy
🎵Rhyme
🔗Collocations
📝Examples
“The student's argument contained a major fallacy that made his entire essay collapse.”
“My mom's fallacy is believing that turning off the wifi will make me study harder.”
“It's a dangerous fallacy to assume that expensive means better quality.”
“The politician's speech was full of fallacies that fooled many voters.”
📚Related Words
Synonyms
Antonyms
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