defatigation

/dɪˌfætɪˈɡeɪʃən/

//dɪˌfætɪˈɡeɪʃən// noun

"defatigation" is a 12-letter English headword indexed on PlainSpell.

The verdict

“defatigation” is uncommon English (outside the top frequency list), classed as a noun. The kind of spelling people second-guess.

Unranked
below top-frequency English
12
letters

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Fatigue; weariness.

Corpus desk

Index EN-defatigation · defatigation · English

defatigation · unranked · 0 variants · 0 confusables

  • FREQ-UNRANKED Unranked
  • LEN-MEGA 12 letters
  • VOW-6 6 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-THIN "D" thin
  • PHOTO-UNK Peer pending

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.

Key facts for defatigation
PropertyValue
Headworddefatigation
LanguageEnglish
Part of speechNoun
IPA/dɪˌfætɪˈɡeɪʃən/
Letters12
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “defatigation” in English

defatigationsits beyond the 100,000 most-frequent English words, in the long tail of technical, archaic, or otherwise rare vocabulary where spelling doubt tends to strike hardest.

Beyond rank #100,000. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

defatigation is uncommon English outside the top frequency list, classed as anoun, transcribed /dɪˌfætɪˈɡeɪʃən/. Rarity is why readers land here mid-draft. Gloss: "Fatigue; weariness.".

Our edit-distance generator produced no likely misspellings for defatigation, which points to an orthography that plays by predictable English rules. Our confusable-pair dataset has no match for it, which tends to mean the word is visually distinctive enough to stand on its own.

Etymologically, the entry records: Latin defatigatio. The correct English form is defatigation, spelled D-E-F-A-T-I-G-A-T-I-O-N.

Definition

  1. 1
    Fatigue; weariness.

Recorded use

Wiktionary example

These source excerpts show how defatigation appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.

  1. Another reprehēſion of this colour is in reſpect of defatigation, vvhich makes perſeuerance of greater dignity than inception, for chance or inſtinct of nature may cauſe inception, but ſetled affection, or iudgement, maketh the continuance.

Etymology

Latin defatigatio.

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "defatigation"?
"defatigation" is spelled D-E-F-A-T-I-G-A-T-I-O-N. The IPA pronunciation is /dɪˌfætɪˈɡeɪʃən/.
What does "defatigation" mean?
As a noun, "defatigation" means: Fatigue; weariness.
How do you pronounce "defatigation"?
The IPA (International Phonetic Alphabet) transcription for "defatigation" is /dɪˌfætɪˈɡeɪʃən/. 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 "defatigation"?
Latin defatigatio. 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.

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

Source: FrequencyWords open word-frequency list