untiring

adj

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

The verdict

“untiring” is uncommon English (frequency #85,898 among 23,789 “U” headwords), classed as an adjective. The kind of spelling people second-guess.

#85,898
frequency rank, English
23,789
“U” headwords

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Not able to be tired; inexhaustible.

Key facts for untiring
PropertyValue
Headworduntiring
LanguageEnglish
Part of speechAdjective
Letters8
Frequency rank#85,898
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Where “untiring” 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). untiring lands here:

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

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

Rare enough to double-check

untiring is uncommon English at frequency #85,898 among 23,789 “U” headwords, classed as anadjective. Rarity is why readers land here mid-draft. 2 senses are on record.

No misspelling variants are generated for untiring in our index, which points to an orthography that plays by predictable English rules. We don't track a confusable pairing for this entry, a sign it's visually distinctive enough not to be mixed up with another word.

Etymologically, the entry records: From un- + tiring. The correct English form is untiring, spelled U-N-T-I-R-I-N-G.

Definition

  1. 1
    Not able to be tired; inexhaustible.
  2. 2
    Unfailing; resolute.

Etymology

From un- + tiring.

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 "untiring"?
"untiring" is spelled U-N-T-I-R-I-N-G.
What does "untiring" mean?
As an adjective, "untiring" means: Not able to be tired; inexhaustible.
What is the origin of the word "untiring"?
From un- + tiring. 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 “untiring”

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

  • The one correct English spelling is U-N-T-I-R-I-N-G - every other letter order is a misspelling in standard orthography.
  • Browse more English words and confusable pairs in the same reference. English words

Other uncommon English words near this rank

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