assert

/əˈsɜːt/

//əˈsɜːt// verb

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

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

The verdict

“assert” has 7 generated spelling variants in the English index at frequency #12,544. The variants make it a useful spelling check.

#12,544
frequency rank, English
3,931
“A” headwords
7
tracked misspellings
18
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - To declare with assurance or plainly and strongly; to state positively.

Corpus desk

Index EN-assert · assert · English

assert · rank #12,544 · 7 variants · 18 confusables

  • FREQ-MID #12,544
  • LEN-LONG 6 letters
  • VOW-2 2 vowels
  • CONFUS-HIGH 18 pairs
  • VAR-MID 7 variants
  • BOOK-MID 3,931
  • PHOTO-FINISH armored

Nearest frequency peer: armored (-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 “assert”

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

corpus weight

What this shows “assert” 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).

assert vs asset
83% similar
assert vs asses
67% similar
assert vs avert
67% similar

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

Key facts for assert
PropertyValue
Headwordassert
LanguageEnglish
Part of speechVerb
IPA/əˈsɜːt/
Letters6
Frequency rank#12,544
Misspellings tracked7
Confusable pairs18
SourceWiktionary (kaikki.org)

Frequency seat of misspelling magnet “assert”

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

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

Scale is logarithmic (each tick is 10× rarer). Same rarity band neighbours include “armored” (#12,543), “atheist” (#12,545), “argentine” (#12,542). Among 3,931 “A” headwords, “assert” is #12,544. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 7 spelling variants around assert (IPA /əˈsɜːt/), averb. Corpus frequency is #12,544 among 3,931 “A” headwords. Wiktionary lists 6 senses, so context still picks the gloss.

Our generated misspelling index lists 7 likely wrong-spelling variants for assert, with forms such as "asert", "asesrt", and "asserrt". 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 18 confusable-pair relationships, "asset", "asses", "avert", and more, a pairing that trips writers up because the two words share enough sound or shape to blur together.

Etymologically, the entry records: From Latin assertus, perfect passive participle of asserō (“declare someone free or a slave by laying hands upon him; hence free from, protect, defend; lay claim to, assert, declare”), from ad (“to”) + serō (“join, range in a row”). The correct English form is assert, spelled A-S-S-E-R-T.

Definition

  1. 1
    To declare with assurance or plainly and strongly; to state positively.
  2. 2
    To use or exercise and thereby prove the existence of.
  3. 3
    To maintain or defend, as a cause or a claim, by words or measures; to vindicate a claim or title to.
  4. 4
    To insist on the legitimacy of one's rights, opinion, etc; not to allow oneself to be dismissed; to ensure that one is taken into consideration; to make oneself respected; to be assertive. See assert oneself.
  5. 5
    To declare that a condition or expression must be true at a certain point in the source code (in some cases causing the program to fail if it is not, as a safeguard).
  6. 6
    To set a signal on a line using a voltage or electric current.

Recorded use

Wiktionary examples

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

  1. Numerous experimental tests and other observations have been offered in favor of animal mind reading, and although many scientists are skeptical, others assert that humans are not the only species capable of representing what others do and don’t perceive and know.
  2. He would often assert that there was life on other planets.

Etymology

From Latin assertus, perfect passive participle of asserō (“declare someone free or a slave by laying hands upon him; hence free from, protect, defend; lay claim to, assert, declare”), from ad (“to”) + serō (“join, range in a row”).

Antonyms

remitdenydeassert

This word in other languages

asegurar(Español)affirmer(Français)versichern(Deutsch)afirmar(Português)

Common misspellings

Also misspelled as:

  • asert
  • asesrt
  • asserrt
  • assertt
  • assetr
  • assret
  • sasert

Misspelling Pattern Breakdown

How far each generated variant is from the correct spelling of assert - expressed in single-character edits (insert, delete, or swap one letter). Bigger bars stand out at a glance; a one-edit slip is the hardest to catch.

asert1asesrt2asserrt1assertt1assetr2assret2sasert2
Edit distance from "assert"

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 "assert"?
"assert" is spelled A-S-S-E-R-T. The IPA pronunciation is /əˈsɜːt/.
What does "assert" mean?
As a verb, "assert" means: To declare with assurance or plainly and strongly; to state positively.
What words are commonly confused with "assert"?
"assert" is commonly confused with "asset", "asses", "avert". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
How do you pronounce "assert"?
The IPA (International Phonetic Alphabet) transcription for "assert" is /əˈsɜːt/. 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 "assert"?
From Latin assertus, perfect passive participle of asserō (“declare someone free or a slave by laying hands upon him; hence free from, protect, defend; lay claim to, assert, declare”), from ad (“to”) + serō (“join, range in a row”). 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 "assert", not the corpus desk frequency band.

Same letter count

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

alpine#12,539yogurt#12,534bombed#12,555canned#12,557

Similar misspelling depth

Headwords with a similar count of attested misspellings (7 here; floor ≥5).

who'd7 variantscarrot7 variantsClive7 variantsdebit7 variants

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

Source: FrequencyWords open word-frequency list