What does cacology mean?
Cacology is a rare English noun meaning bad or faulty speech — most specifically, incorrect or unpleasing pronunciation and diction. It derives from the Greek root kakos, meaning 'bad', combined with -logy, so it belongs to the same family as cacophony (harsh sound) and cacography (poor handwriting or spelling). The word surfaced chiefly in older works on rhetoric and elocution, where writers catalogued the errors speakers ought to avoid, and it survives today mostly in scholarly or deliberately ornate prose. To accuse someone of cacology is to criticize how they speak rather than what they say, which gives the term a distinctly judgmental flavor. Though seldom heard in ordinary conversation, it remains a precise label for defective utterance and a useful example of English's productive borrowing of Greek negative prefixes. Its rarity itself makes it a favorite among collectors of obscure vocabulary.
nounBad or faulty speech; incorrect or unpleasing pronunciation and diction. The term is chiefly used in discussions of language and rhetoric to describe defective utterance.
- Bad or faulty pronunciation or diction; defective utterance.
"The professor marked down the essay not for its ideas but for its persistent cacology."
"His otherwise brilliant lecture was undermined by a constant cacology that left key terms unintelligible."
"Nineteenth-century elocutionists compiled long lists of common errors of cacology to be drilled out of their students."
Usually treated as an uncountable abstraction, but the plural appears when enumerating specific faults of speech.
"The text lists dozens of cacologies, from dropped consonants to mangled vowels."
If cacophony is ugly sound and cacography is ugly writing, then cacology is the third sibling in Greek's family of 'bad' words — the one reserved for ugly speech.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of cacology
Cacology comes from the Greek adjective kakos, meaning 'bad' or 'evil', joined to the suffix -logy from logos ('word' or 'speech'), giving the sense 'bad speaking'. It entered English through learned Latinized usage, appearing in scholarly writing on rhetoric and pronunciation by around the early nineteenth century. It shares its root with cacophony, cacography, and other Greek-derived 'caco-' words that denote defective or unpleasant forms of sound, writing, or expression.
How cacology is actually used
Cacology is a rare, learned word found mainly in older rhetorical and elocution treatises rather than everyday conversation. It carries a mildly pejorative, judgmental tone, implying that a speaker's delivery is defective.
Easily confused with cacology
Cacography means bad handwriting or bad spelling, whereas cacology refers to bad speech or pronunciation.