epi-

prefix

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

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

The verdict

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

Unranked
below top-frequency English
4
letters

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Above in location or position.

Key facts for epi-
PropertyValue
Headwordepi-
LanguageEnglish
Part of speechPrefix
Letters4
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Where “epi-” sits in English frequency

epi- 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 epi- is 4 letters long, classified as a prefix. It sits outside the most-frequent rank tiers, which is often why uncommon words generate more spelling variants per reader. Wiktionary records 27 distinct senses for this headword, so context determines which meaning a reader should apply.

epi- has no tracked misspelling variants, and the word's spelling is regular enough that our generator found nothing worth flagging. We don't track a confusable pairing for this entry, since nothing in our dataset looks or sounds close enough to cause mix-ups.

Etymologically, the entry records: From Ancient Greek ἐπί (epí, “on top of”). The correct English form is epi-, spelled E-P-I--.

Definition

  1. 1
    Above in location or position.
  2. 2
    Upon, atop, directly on top of in terms of position.
  3. 3
    Relating to epigenetics.
  4. 4
    Secondary: a consequence, by-product, additional, or lesser version.
  5. 5
    A part or segment that is located on the upper part of an object.
  6. 6
    A part or location that is outer, particularly an outer layer.
  7. 7
    Denotes an epimeric form.
  8. 8
    Located on the surface.
  9. 9
    Epibiotic: an organism that lives on another organism.
  10. 10
    Outward in direction or projection.
  11. 11
    More, above a usual quantity, additional in quantity.
  12. 12
    Beyond, meta, transcending.
  13. 13
    Epidemiology
  14. 14
    Near in position.
  15. 15
    Outranked, above in rank.
  16. 16
    Surrounding in position: the edges of the root entity.
  17. 17
    Covering: the root entity is covered.
  18. 18
    After in time.
  19. 19
    Overlapping in position.
  20. 20
    Mapping onto, passing along, resolving to.
  21. 21
    Top: a part that is positioned at the uppermost of multiple levels.
  22. 22
    Front or anterior in position.
  23. 23
    Entirety, a system being referred to as a whole.
  24. 24
    Outside of in position.
  25. 25
    Shallow in depth.
  26. 26
    Similar, in the same form of, resembling.
  27. 27
    Upwards in direction or growth.

Etymology

From Ancient Greek ἐπί (epí, “on top of”).

Synonyms

on-en-super-supra-sur-hyper-

This word in other languages

epi-(Español)épi-(Français)

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 "epi-"?
"epi-" is spelled E-P-I--.
What does "epi-" mean?
As a prefix, "epi-" means: Above in location or position.
What is the origin of the word "epi-"?
From Ancient Greek ἐπί (epí, “on top of”). 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 “epi-”

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

  • The one correct English spelling is E-P-I-- - every other letter order is a misspelling in standard orthography.
  • 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