diabolic

/ˌdaɪəˈbɒlɪk/

//ˌdaɪəˈbɒlɪk// adj

"diabolic" is a 8-letter English headword indexed on PlainSpell.

The verdict

“diabolic” is an uncommon English word, ranked #78,527 in English word frequency and used as an adjective.

#78,527
frequency rank, English
8
letters

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Of, being, or pertaining to a devil or the Devil.

Key facts for diabolic
PropertyValue
Headworddiabolic
LanguageEnglish
Part of speechAdjective
IPA/ˌdaɪəˈbɒlɪk/
Letters8
Frequency rank#78,527
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Where “diabolic” sits in English frequency

Every-word frequency runs from the handful of words we use constantly (left) to the long tail used once in a blue moon (right). diabolic lands here:

#1#100#1K#10K#100K
← used constantlyrarely used →

Scale is logarithmic (each tick is 10× rarer). Source: FrequencyWords open word-frequency list.

Spelling & Dictionary Insight

The English entry for diabolic is 8 letters long, classified as an adjective, and transcribed in the International Phonetic Alphabet as /ˌdaɪəˈbɒlɪk/. Corpus data places it at rank #78,527 in overall English word frequency, marking it as uncommon enough that many writers pause before typing it. Wiktionary records 3 distinct senses for this headword, so context determines which meaning a reader should apply.

diabolic has no tracked misspelling variants, a sign its spelling follows regular English conventions. Our dataset records no confusable match here, since nothing in our dataset looks or sounds close enough to cause mix-ups.

Etymologically, the entry records: From Middle English diabolik, from Middle French diabolique, from Late Latin diabolicus, from Ancient Greek διαβολικός (diabolikós, “devilish”), from διάβολος (diábolos, “devil”). First attested in 1350–1400. The correct English form is diabolic, spelled D-I-A-B-O-L-I-C.

Definition

  1. 1
    Of, being, or pertaining to a devil or the Devil.
  2. 2
    Having qualities traditionally attributed to devils.
  3. 3
    Having qualities traditionally attributed to devils.

Etymology

From Middle English diabolik, from Middle French diabolique, from Late Latin diabolicus, from Ancient Greek διαβολικός (diabolikós, “devilish”), from διάβολος (diábolos, “devil”). First attested in 1350–1400.

This word in other languages

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA); frequency ordering uses the FrequencyWords open word-frequency list (2018 English corpus, MIT). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "diabolic"?
"diabolic" is spelled D-I-A-B-O-L-I-C. The IPA pronunciation is /ˌdaɪəˈbɒlɪk/.
What does "diabolic" mean?
As an adjective, "diabolic" means: Of, being, or pertaining to a devil or the Devil.
How do you pronounce "diabolic"?
The IPA (International Phonetic Alphabet) transcription for "diabolic" is /ˌdaɪəˈbɒlɪk/. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What is the origin of the word "diabolic"?
From Middle English diabolik, from Middle French diabolique, from Late Latin diabolicus, from Ancient Greek διαβολικός (diabolikós, “devilish”), from διάβολος (diábolos, “devil”). First attested in 1350–1400. See the full etymology section above for more details.
Is PlainSpell free to use?
Yes, PlainSpell is a completely free word reference. You can look up definitions, pronunciations, confusable pairs, homophones, and spelling corrections across 5 languages without any sign-up or subscription.

Using “diabolic”

The practical upshot for anyone who landed here from a spell-check.

  • The one correct English spelling is D-I-A-B-O-L-I-C - every other letter order is a misspelling in standard orthography.
  • Say it as /ˌdaɪəˈbɒlɪk/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
  • Browse more English words and confusable pairs in the same reference. English words
Data Source

Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Word ordering uses an open word-frequency list; misspelling variants are generated by edit-distance from the correct headword.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list FrequencyWords open word-frequency list