fiendishly
/ˈfiːndɪʃli/
"fiendishly" is a 10-letter English headword indexed on PlainSpell.
The verdict
“fiendishly” is uncommon English (frequency #91,500 among 2,507 “F” headwords), classed as an adverb. The kind of spelling people second-guess.
- #91,500
- frequency rank, English
- 2,507
- “F” headwords
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - In a fiendish manner; evilly, wickedly.
Corpus desk
Index EN-fiendishly · fiendishly · English
fiendishly · rank #91,500 · 0 variants · 0 confusables
- FREQ-RARE #91,500
- LEN-MEGA 10 letters
- VOW-4 4 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-MID 2,507
- PHOTO-FINISH fibrotic
Nearest frequency peer: fibrotic (-1 rank slots)
Read with this headword: Spelling guide for this pattern
Desk codes from Wiktionary headword shape, FrequencyWords rank tier, confusable-pair count, generated misspelling depth, letter-cohort book size, and photo-finish peer. Not a difficulty grade.
Long-tail ranks near “fiendishly”
Sparse band: bars invert rank so rarer forms read shorter
- feh
feh
8,508 corpus weight
- fennec
fennec
8,506 corpus weight
- fibrotic
fibrotic
8,502 corpus weight
- fiendishly
fiendishly
8,501 corpus weight
- Filson
Filson
8,500 corpus weight
- flaying
flaying
8,493 corpus weight
What this shows Long-tail view: where “fiendishly” sits against similarly uncommon English ranks.
| Property | Value |
|---|---|
| Headword | fiendishly |
| Language | English |
| Part of speech | Adverb |
| IPA | /ˈfiːndɪʃli/ |
| Letters | 10 |
| Frequency rank | #91,500 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Long-tail rank of “fiendishly” in English
Rare enough to double-check
fiendishly is uncommon English at frequency #91,500 among 2,507 “F” headwords, classed as anadverb, transcribed /ˈfiːndɪʃli/. Rarity is why readers land here mid-draft. 2 senses are on record.
fiendishly doesn't appear in our generated misspelling index, a sign its spelling follows regular English conventions. It is not paired with a close-neighbour confusable in our dataset, which typically means the spelling is too distinctive to be mistaken for another word.
Etymologically, the entry records: From fiendish + -ly. The correct English form is fiendishly, spelled F-I-E-N-D-I-S-H-L-Y.
Definition
- 1In a fiendish manner; evilly, wickedly.
- 2Extremely, very in harsh or negative contexts.
Recorded use
Wiktionary examplesThese source excerpts show how fiendishly appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
At a side door, reclined on a couch, two guards of the haram, with their naked swords grasped in their hands, and features, fiendishly contorted between sleep and dissolution, seemed to menace death to any who should venture to approach.
[…] I was suddenly awakened by a savage looking fellow standing close to my bedside, ordering me and my companion to leave our bed forthwith or suffer the consequences; at the same time using the most blasphemous language, and uttering the most hideous oaths imaginable, while fiendishly striking his huge fists in close proximity to my face.
Etymology
From fiendish + -ly.
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
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Similar English words by spelling shape
Same letter count and similar misspelling depth for "fiendishly", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 10 letters (nearest by frequency rank).