parenthesis

/pəˈɹɛnθəsɪs/

//pəˈɹɛnθəsɪs// noun

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

"parenthesis" is a 11-letter English headword indexed on PlainSpell.

The verdict

“parenthesis” has 17 generated spelling variants in the English index at frequency #45,571. The variants make it a useful spelling check.

#45,571
frequency rank, English
4,417
“P” headwords
17
tracked misspellings
1
confusable pair

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - A clause, phrase or word which is inserted (usually for explanation or amplification) into a passage which is already grammatically complete, and usually marked off with brackets, commas or dashes.

Corpus desk

Index EN-parenthesis · parenthesis · English

parenthesis · rank #45,571 · 17 variants · 1 confusable

  • FREQ-MID #45,571
  • LEN-MEGA 11 letters
  • VOW-4 4 vowels
  • CONFUS-LOW 1 pairs
  • VAR-HIGH 17 variants
  • BOOK-MID 4,417
  • PHOTO-FINISH parasol

Nearest frequency peer: parasol (-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 “parenthesis”

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

corpus weight

What this shows “parenthesis” 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).

parenthesis vs parentheses
91% similar

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

Key facts for parenthesis
PropertyValue
Headwordparenthesis
LanguageEnglish
Part of speechNoun
IPA/pəˈɹɛnθəsɪs/
Letters11
Frequency rank#45,571
Misspellings tracked17
Confusable pairs1
SourceWiktionary (kaikki.org)

Frequency seat of misspelling magnet “parenthesis”

Every-word frequency runs from the handful of words we use constantly (left) to the long tail used once in a blue moon (right).parenthesislands here:

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

The axis is logarithmic, with each marked tick roughly ten times rarer than the last. Same rarity band neighbours include “parasol” (#45,570), “parser” (#45,572), “panicky” (#45,568). Among 4,417 “P” headwords, “parenthesis” is #45,571. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 17 spelling variants around parenthesis (IPA /pəˈɹɛnθəsɪs/), anoun. Corpus frequency is #45,571 among 4,417 “P” headwords. Wiktionary lists 4 senses, so context still picks the gloss.

Our generated misspelling index lists 17 likely wrong-spelling variants for parenthesis, with forms such as "aprenthesis", "paernthesis", and "parenhtesis". Each of these forms differs from the correct spelling by one small edit: a doubled letter, a dropped silent letter, or a substituted vowel. It also participates in 1 confusable-pair relationship, "parentheses", a pairing that trips writers up because the two words share enough sound or shape to blur together.

Etymologically, the entry records: Learned borrowing from Late Latin parenthesis (“addition of a letter to a syllable in a word”), itself borrowed from Ancient Greek παρένθεσις (parénthesis, “insertion”). By surface analysis, par- + en- + thesis. The correct English form is parenthesis, spelled P-A-R-E-N-T-H-E-S-I-S.

Definition

  1. 1
    A clause, phrase or word which is inserted (usually for explanation or amplification) into a passage which is already grammatically complete, and usually marked off with brackets, commas or dashes.
  2. 2
    Either of a pair of brackets, especially (mainly US) round brackets, ( and ) (used to enclose parenthetical material in a text).
  3. 3
    A digression; the use of such digressions.
  4. 4
    Such brackets as used to clarify expressions by grouping those terms affected by a common operator, or to enclose the components of a vector or the elements of a matrix.

Recorded use

Wiktionary examples

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

  1. How expressive this little parenthesis: "Sakuntalâ makes a chiding gesture with her finger"!
  2. There be five manner of points and divisions most used among cunning men; the which if they be well used, make the sentence very light and easy to be understood, both to the reader and hearer: and they be these, virgil,—come,—parenthesis,—plain point,—interrogative[…] it is a slender stroke leaning forward, betokening a little short rest, without any perf…

Etymology

Learned borrowing from Late Latin parenthesis (“addition of a letter to a syllable in a word”), itself borrowed from Ancient Greek παρένθεσις (parénthesis, “insertion”). By surface analysis, par- + en- + thesis.

Synonyms

parathesisappositionround bracketparenthesis-pointparen

This word in other languages

paréntesis(Español)parenthèse(Français)Parenthese(Deutsch)parêntese(Português)

Common misspellings

Also misspelled as:

  • aprenthesis
  • paernthesis
  • parenhtesis
  • parennthesis
  • parentehsis
  • parentheiss
  • parenthesiss
  • parenthessi
  • parenthessis
  • parenthhesis
  • parenthseis
  • parentthesis
  • paretnhesis
  • parnethesis
  • parrenthesis
  • pparenthesis
  • praenthesis

Misspelling Pattern Breakdown

How far each generated variant is from the correct spelling of parenthesis - counted as single-character edits (an insertion, a deletion, or a substituted letter). The larger the bar, the easier the typo is to spot; one-edit slips are the ones that sneak past readers.

aprenthesis2paernthesis2parenhtesis2parennthesis1parentehsis2parentheiss2parenthesiss1parenthessi2
Edit distance from "parenthesis"

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 "parenthesis"?
"parenthesis" is spelled P-A-R-E-N-T-H-E-S-I-S. The IPA pronunciation is /pəˈɹɛnθəsɪs/.
What does "parenthesis" mean?
As a noun, "parenthesis" means: A clause, phrase or word which is inserted (usually for explanation or amplification) into a passage which is already grammatically complete, and usually marked off with brackets, commas or dashes.
What words are commonly confused with "parenthesis"?
"parenthesis" is commonly confused with "parentheses". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
How do you pronounce "parenthesis"?
The IPA (International Phonetic Alphabet) transcription for "parenthesis" is /pəˈɹɛnθəsɪs/. 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 "parenthesis"?
Learned borrowing from Late Latin parenthesis (“addition of a letter to a syllable in a word”), itself borrowed from Ancient Greek παρένθεσις (parénthesis, “insertion”). By surface analysis, par- + en- + thesis. 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 "parenthesis", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 11 letters (nearest by frequency rank).

multiracial#45,528Rockhampton#45,635liposuction#45,484supposition#45,685

Similar misspelling depth

Headwords with a similar count of attested misspellings (17 here; floor ≥5).

isolationist17 variantsimpulsively17 variantsgrudgingly17 variantsdrawstring17 variants

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

Source: FrequencyWords open word-frequency list