-ize

/-aɪz/

//-aɪz// suffix

"ize" is a 3-letter English headword indexed on PlainSpell.

The verdict

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

Unranked
below top-frequency English
4
letters

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Used to form verbs from nouns or adjectives, especially similative verbs

Corpus desk

Index EN-ize · -ize · English

-ize · unranked · 0 variants · 0 confusables

  • FREQ-UNRANKED Unranked
  • LEN-MID 4 letters
  • VOW-2 2 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-THIN "-" 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 -ize
PropertyValue
Headword-ize
LanguageEnglish
Part of speechSuffix
IPA/-aɪz/
Letters4
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “-ize” in English

-izefalls 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

-ize is uncommon English outside the top frequency list, classed as asuffix, transcribed /-aɪz/. Rarity is why readers land here mid-draft. 2 senses are on record.

We couldn't generate a plausible misspelling set for -ize, suggesting the orthography follows predictable English patterns. It is not paired with a close-neighbour confusable in our dataset, a sign it's visually distinctive enough not to be mixed up with another word.

Etymologically, the entry records: From Middle English -isen, from Middle French -iser, from Late Latin -izāre, from Ancient Greek -ίζω (-ízō), from Proto-Indo-European *-idyé- (verbal suffix). Cognate with Old English -ettan (verbal suffix). The correct English form is -ize, spelled --I-Z-E.

Definition

  1. 1
    Used to form verbs from nouns or adjectives, especially similative verbs
  2. 2
    Used to form verbs from nouns or adjectives, especially similative verbs

Recorded use

Wiktionary examples

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

  1. pixel + -ize → pixelize
  2. cannibal + -ize → cannibalize

Etymology

From Middle English -isen, from Middle French -iser, from Late Latin -izāre, from Ancient Greek -ίζω (-ízō), from Proto-Indo-European *-idyé- (verbal suffix). Cognate with Old English -ettan (verbal suffix).

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). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "-ize"?
"-ize" is spelled --I-Z-E. The IPA pronunciation is /-aɪz/.
What does "-ize" mean?
As a suffix, "-ize" means: Used to form verbs from nouns or adjectives, especially similative verbs
How do you pronounce "-ize"?
The IPA (International Phonetic Alphabet) transcription for "-ize" is /-aɪz/. 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 "-ize"?
From Middle English -isen, from Middle French -iser, from Late Latin -izāre, from Ancient Greek -ίζω (-ízō), from Proto-Indo-European *-idyé- (verbal suffix). Cognate with Old English -ettan (verbal suffix). 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