postfix

/ˈpəʊst.fɪks/

//ˈpəʊst.fɪks// verb

"postfix" is a 7-letter English headword indexed on PlainSpell.

The verdict

“postfix” is outside the top-ranked English vocabulary, used as a verb - the kind of word writers most often double-check.

Unranked
below top-frequency English
7
letters

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - To suffix.

Key facts for postfix
PropertyValue
Headwordpostfix
LanguageEnglish
Part of speechVerb
IPA/ˈpəʊst.fɪks/
Letters7
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Where “postfix” sits in English frequency

postfix 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.

Spelling & Dictionary Insight

The English entry for postfix is 7 letters long, classified as a verb, and transcribed in the International Phonetic Alphabet as /ˈpəʊst.fɪks/. It sits outside the most-frequent rank tiers, which is often why uncommon words generate more spelling variants per reader. Wiktionary records 2 distinct senses for this headword, so context determines which meaning a reader should apply.

Our edit-distance generator produced no likely misspellings for postfix, 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 post- + fix. The correct English form is postfix, spelled P-O-S-T-F-I-X.

Definition

  1. 1
    To suffix.
  2. 2
    To subject a sample to postfixation

Etymology

From post- + fix.

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 "postfix"?
"postfix" is spelled P-O-S-T-F-I-X. The IPA pronunciation is /ˈpəʊst.fɪks/.
What does "postfix" mean?
As a verb, "postfix" means: To suffix.
How do you pronounce "postfix"?
The IPA (International Phonetic Alphabet) transcription for "postfix" is /ˈpəʊst.fɪks/. 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 "postfix"?
From post- + 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.

Using “postfix”

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

  • The one correct English spelling is P-O-S-T-F-I-X - every other letter order is a misspelling in standard orthography.
  • Say it as /ˈpəʊst.fɪks/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
  • Browse more English words and confusable pairs in the same reference. English words
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