prefix

/ˈpɹiːfɪks/

//ˈpɹiːfɪks// noun

By · According to Wiktionary data (CC BY-SA) ·

"prefix" is a 6-letter English headword indexed on PlainSpell.

The verdict

“prefix” has 9 generated spelling variants in the English index at frequency #21,623. The variants make it a useful spelling check.

#21,623
frequency rank, English
4,417
“P” headwords
9
tracked misspellings
2
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Something placed before another

Corpus desk

Index EN-prefix · prefix · English

prefix · rank #21,623 · 9 variants · 2 confusables

  • FREQ-MID #21,623
  • LEN-LONG 6 letters
  • VOW-2 2 vowels
  • CONFUS-LOW 2 pairs
  • VAR-MID 9 variants
  • BOOK-MID 4,417
  • PHOTO-FINISH pollock

Nearest frequency peer: pollock (-1 rank slots)

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.

Rank peers near misspelling magnet “prefix”

Same rarity band: useful when a typo lands on a peer headword

corpus weight

What this shows “prefix” sits among these FrequencyWords peers; misspelling depth is tracked separately in the edit-distance chart.

Source FrequencyWords open word-frequency list As of September 3, 2026

Visual similarity to commonly confused words

How many letter changes separate each confused pair (Levenshtein distance, normalized).

prefix vs profit
67% similar
prefix vs prefer
67% similar

Source: PlainSpell confusable corpus (Wiktionary, CC BY-SA).

Key facts for prefix
PropertyValue
Headwordprefix
LanguageEnglish
Part of speechNoun
IPA/ˈpɹiːfɪks/
Letters6
Frequency rank#21,623
Misspellings tracked9
Confusable pairs2
SourceWiktionary (kaikki.org)

Frequency seat of misspelling magnet “prefix”

Word frequency stretches from the small set of words we reach for constantly (left) out to the long tail barely used once in a while (right).prefixlands here:

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

Ticks step logarithmically, so each one marks a roughly tenfold drop in how often the word turns up. Same rarity band neighbours include “pollock” (#21,622), “proctor” (#21,624), “polled” (#21,621). Among 4,417 “P” headwords, “prefix” is #21,623. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 9 spelling variants around prefix (IPA /ˈpɹiːfɪks/), anoun. Corpus frequency is #21,623 among 4,417 “P” headwords. Wiktionary lists 4 senses, so context still picks the gloss.

Our generated misspelling index lists 9 likely wrong-spelling variants for prefix, with forms such as "perfix", "pprefix", and "preffix". Every one of these variants traces to a single-character edit -- an added or dropped letter, a swapped consonant, or a vowel swap -- the kind of slip a spell-checker is built to catch. It also participates in 2 confusable-pair relationships, "profit", "prefer", since the words sound or look close enough that writers reach for the wrong one mid-sentence.

Etymologically, the entry records: Borrowed from Late Latin praefīxum, from Latin praefīxus, past participle of praefīgō (“I (fix, fasten, set up) in front”, “I fix on the (end, extremity)”) (from prae- (“before”) + fīgō (“I fix”, “I fasten”, “I affix”)), equivalent to pre- + -fix. Doublet o… The correct English form is prefix, spelled P-R-E-F-I-X.

Definition

  1. 1
    Something placed before another
  2. 2
    Something placed before another
  3. 3
    Something placed before another
  4. 4
    Something placed before another

Recorded use

Wiktionary examples

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

  1. The chosen prefixes won the vote in part because they start with the only two letters left in the alphabet that are not already used in measurement. The b for “bronto” is already used for bytes and h for “hella” is used for hecto, the prefix for 100.
  2. in the UK, a number with an 0800 prefix is a toll-free number.

Etymology

Borrowed from Late Latin praefīxum, from Latin praefīxus, past participle of praefīgō (“I (fix, fasten, set up) in front”, “I fix on the (end, extremity)”) (from prae- (“before”) + fīgō (“I fix”, “I fasten”, “I affix”)), equivalent to pre- + -fix. Doublet of the archaic synonym prefixum.

Synonyms

forefix

This word in other languages

prefijo(Español)préfixe(Français)Präfix(Deutsch)

Common misspellings

Also misspelled as:

  • perfix
  • pprefix
  • preffix
  • prefixx
  • prefxi
  • preifx
  • prfeix
  • prrefix
  • rpefix

Misspelling Pattern Breakdown

How far each generated variant is from the correct spelling of prefix - measured in single-character edits (insert, delete, or substitute a letter). Larger bars are easier to catch; one-edit slips are the sneakiest.

perfix2pprefix1preffix1prefixx1prefxi2preifx2prfeix2prrefix1
Edit distance from "prefix"

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 "prefix"?
"prefix" is spelled P-R-E-F-I-X. The IPA pronunciation is /ˈpɹiːfɪks/.
What does "prefix" mean?
As a noun, "prefix" means: Something placed before another
What words are commonly confused with "prefix"?
"prefix" is commonly confused with "profit", "prefer". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
How do you pronounce "prefix"?
The IPA (International Phonetic Alphabet) transcription for "prefix" is /ˈpɹiːfɪks/. 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 "prefix"?
Borrowed from Late Latin praefīxum, from Latin praefīxus, past participle of praefīgō (“I (fix, fasten, set up) in front”, “I fix on the (end, extremity)”) (from prae- (“before”) + fīgō (“I fix”, “I fasten”, “I affix”)), equivalent to pre- + -fix.... 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.

Similar English words by spelling shape

Same letter count and similar misspelling depth for "prefix", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 6 letters (nearest by frequency rank).

polled#21,621pueblo#21,628pulpit#21,629pedals#21,612

Similar misspelling depth

Headwords with a similar count of attested misspellings (9 here; floor ≥5).

pollock9 variantsPollard9 variantsRobson9 variantsNguyen9 variants

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

Source: FrequencyWords open word-frequency list