ir-

prefix

"ir" is a 2-letter English headword indexed on PlainSpell.

The verdict

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

Unranked
below top-frequency English
3
letters

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Used for expressing negation; not

Corpus desk

Index EN-ir · ir- · English

ir- · unranked · 0 variants · 0 confusables

  • FREQ-UNRANKED Unranked
  • LEN-MID 3 letters
  • VOW-1 1 vowel
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-THIN "I" 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 ir-
PropertyValue
Headwordir-
LanguageEnglish
Part of speechPrefix
Letters3
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “ir-” in English

ir-falls 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

ir- is uncommon English outside the top frequency list, classed as aprefix. Rarity is why readers land here mid-draft. Gloss: "Used for expressing negation; not".

We couldn't generate a plausible misspelling set for ir-, a straightforward case of a spelling with little room for common typos. No confusable counterpart is on file for this word, since its spelling is unusual enough that it doesn't cluster with a lookalike.

Etymologically, the entry records: From Latin ir-, assimilated form of in- used before r-. The correct English form is ir-, spelled I-R--.

Definition

  1. 1
    Used for expressing negation; not

Etymology

From Latin ir-, assimilated form of in- used before r-.

Synonyms

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 "ir-"?
"ir-" is spelled I-R--.
What does "ir-" mean?
As a prefix, "ir-" means: Used for expressing negation; not
What is the origin of the word "ir-"?
From Latin ir-, assimilated form of in- used before r-. 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