defatigable

[dɪˈfætɪɡəbəɫ]

/[dɪˈfætɪɡəbəɫ]/ adj

"defatigable" is a 11-letter English headword indexed on PlainSpell.

The verdict

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

Unranked
below top-frequency English
11
letters

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Easily tired or wearied; capable of being fatigued.

Corpus desk

Index EN-defatigable · defatigable · English

defatigable · unranked · 0 variants · 0 confusables

  • FREQ-UNRANKED Unranked
  • LEN-MEGA 11 letters
  • VOW-5 5 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 defatigable
PropertyValue
Headworddefatigable
LanguageEnglish
Part of speechAdjective
IPA[dɪˈfætɪɡəbəɫ]
Letters11
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “defatigable” in English

defatigablefalls outside the top-100,000 ranked English words, the long-tail zone of technical, archaic, or low-frequency vocabulary, exactly where readers second-guess spellings most.

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

Rare enough to double-check

defatigable is uncommon English outside the top frequency list, classed as anadjective, transcribed [dɪˈfætɪɡəbəɫ]. Rarity is why readers land here mid-draft. Gloss: "Easily tired or wearied; capable of being fatigued.".

The misspelling generator found no plausible variants for defatigable, suggesting the orthography follows predictable English patterns. This entry stands alone in our confusable dataset, which tends to mean the word is visually distinctive enough to stand on its own.

Etymologically, the entry records: From Latin defatigatus, past participle of defatigare (“to tire or weary”). The correct English form is defatigable, spelled D-E-F-A-T-I-G-A-B-L-E.

Definition

  1. 1
    Easily tired or wearied; capable of being fatigued.

Recorded use

Wiktionary example

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

  1. The author wishes to acknowledge the help of his peerful editor, Fredrica Friedman, and his defatigable researcher, Susan Hall, as well as that of his severest critic, P. Bear.

Etymology

From Latin defatigatus, past participle of defatigare (“to tire or weary”).

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 "defatigable"?
"defatigable" is spelled D-E-F-A-T-I-G-A-B-L-E. The IPA pronunciation is [dɪˈfætɪɡəbəɫ].
What does "defatigable" mean?
As an adjective, "defatigable" means: Easily tired or wearied; capable of being fatigued.
How do you pronounce "defatigable"?
The IPA (International Phonetic Alphabet) transcription for "defatigable" is [dɪˈfætɪɡəbəɫ]. 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 "defatigable"?
From Latin defatigatus, past participle of defatigare (“to tire or weary”). 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