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adj

diabolical

deye-uh-BO-lih-kuh

Diabolical (adj) means Extremely cruel or wicked; evil. Example: “The villain hatched a diabolical plan to destroy the city.”

adj
1
Extremely cruel or wicked; evil.
"The villain hatched a diabolical plan to destroy the city."
"It was a diabolical act of betrayal that no one saw coming."
2
(informal) Very bad or dreadful.
"The weather on our camping trip was absolutely diabolical."

How to use diabolical

Learner’s notes

In plain EnglishDevilishly evil, or — used more loosely — extremely bad.

When to use it

In British English, "diabolical" is often used casually to mean "terrible," well beyond anything actually evil.

Common pairings
diabolical plan diabolical weather diabolical scheme

Word forms

more diabolical comparative, most diabolical superlative

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The villain hatched a _____ plan to destroy the city.

Etymology

From diabolic + -al, ultimately from Greek diabolos ("slanderer, devil").

Origin: Greek

cacodaemoniacal daemonical demoniac demoniacal demonic demonical demonish demonlike demonly devilish diabolic fallen angelic

Antonyms

angelic divine undemonic undevilish undiabolical unsatanic nondemonic nondiabolic

Related words

Rhymes for diabolical

See all rhymes for diabolical →

Frequently asked questions

What does “diabolical” mean?

The word “diabolical” means extremely cruel or wicked; evil. In plain terms, devilishly evil, or — used more loosely — extremely bad.

How do you pronounce “diabolical”?

“Diabolical” is pronounced deye-uh-BO-lih-kuh ([ˌdaɪəˈbɑlɪkəɫ] in IPA).

How do you use “diabolical” in a sentence?

Here is “diabolical” used in a sentence: “The villain hatched a diabolical plan to destroy the city.”

What is another word for “diabolical”?

Words with a similar meaning to “diabolical” include cacodaemoniacal, daemonical, demoniac, demoniacal, demonic and demonical.

What is the opposite of “diabolical”?

The opposite of “diabolical” — its antonyms — are angelic, divine, undemonic, undevilish and undiabolical.

What part of speech is “diabolical”?

“Diabolical” is an adjective.

Where does the word “diabolical” come from?

The word “diabolical” comes from Greek. From diabolic + -al, ultimately from Greek diabolos ("slanderer, devil").

How many meanings does “diabolical” have?

“Diabolical” has 2 distinct senses listed in this dictionary. The most common is: extremely cruel or wicked; evil.

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Definitions: FreeDict original editorial