extra-

prefix

"extra" is a 5-letter English headword indexed on PlainSpell.

The verdict

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

Unranked
below top-frequency English
6
letters

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Outside of, beyond.

Corpus desk

Index EN-extra · extra- · English

extra- · unranked · 0 variants · 0 confusables

  • FREQ-UNRANKED Unranked
  • LEN-LONG 6 letters
  • VOW-2 2 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-THIN "E" 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 extra-
PropertyValue
Headwordextra-
LanguageEnglish
Part of speechPrefix
Letters6
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “extra-” in English

extra-sits beyond the 100,000 most-frequent English words, in the long tail of technical, archaic, or otherwise rare vocabulary where spelling doubt tends to strike hardest.

Beyond rank #100,000. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

extra- is uncommon English outside the top frequency list, classed as aprefix. Rarity is why readers land here mid-draft. Gloss: "Outside of, beyond.".

No misspelling variants are generated for extra- in our index, suggesting the orthography follows predictable English patterns. We don't track a confusable pairing for this entry, which typically means the spelling is too distinctive to be mistaken for another word.

Etymologically, the entry records: From Latin extra (“outside, except, beyond”, adverb and preposition), from exter (“being on the outside”). The correct English form is extra-, spelled E-X-T-R-A--.

Definition

  1. 1
    Outside of, beyond.

Recorded use

Wiktionary example

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

  1. extramarital: outside of marriage

Etymology

From Latin extra (“outside, except, beyond”, adverb and preposition), from exter (“being on the outside”).

Synonyms

Antonyms

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 "extra-"?
"extra-" is spelled E-X-T-R-A--.
What does "extra-" mean?
As a prefix, "extra-" means: Outside of, beyond.
What is the origin of the word "extra-"?
From Latin extra (“outside, except, beyond”, adverb and preposition), from exter (“being on the outside”). 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