infinitesimal

/ˌɪnfɪnɪˈtɛsɪməl/

//ˌɪnfɪnɪˈtɛsɪməl// adj

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

"infinitesimal" is a 13-letter English headword indexed on PlainSpell.

The verdict

“infinitesimal” has 19 generated spelling variants in the English index at frequency #45,449. The variants make it a useful spelling check.

#45,449
frequency rank, English
2,140
“I” headwords
19
tracked misspellings

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Incalculably, exceedingly, or immeasurably minute; vanishingly small.

Corpus desk

Index EN-infinitesimal · infinitesimal · English

infinitesimal · rank #45,449 · 19 variants · 0 confusables

  • FREQ-MID #45,449
  • LEN-MEGA 13 letters
  • VOW-6 6 vowels
  • CONFUS-0 No pairs
  • VAR-HIGH 19 variants
  • BOOK-MID 2,140
  • PHOTO-FINISH inequities

Nearest frequency peer: inequities (-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 “infinitesimal”

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

corpus weight

What this shows “infinitesimal” 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
Key facts for infinitesimal
PropertyValue
Headwordinfinitesimal
LanguageEnglish
Part of speechAdjective
IPA/ˌɪnfɪnɪˈtɛsɪməl/
Letters13
Frequency rank#45,449
Misspellings tracked19
Confusable pairs0
SourceWiktionary (kaikki.org)

Frequency seat of misspelling magnet “infinitesimal”

Word frequency stretches from the small set of words we reach for constantly (left) out to the long tail barely used once in a while (right).infinitesimallands here:

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

Scale is logarithmic (each tick is 10× rarer). Same rarity band neighbours include “inequities” (#45,448), “inedible” (#45,447), “impulsively” (#45,445). Among 2,140 “I” headwords, “infinitesimal” is #45,449. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 19 spelling variants around infinitesimal (IPA /ˌɪnfɪnɪˈtɛsɪməl/), anadjective. Corpus frequency is #45,449 among 2,140 “I” headwords. Wiktionary lists 3 senses, so context still picks the gloss.

Our generated misspelling index lists 19 likely wrong-spelling variants for infinitesimal, with forms such as "ifninitesimal", "inffinitesimal", and "infiintesimal". 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. This entry stands alone in our confusable dataset, since nothing in our dataset looks or sounds close enough to cause mix-ups.

Etymologically, the entry records: From New Latin īnfīnītēsimus + -al. Displaced earlier coordinate term fluxion. The correct English form is infinitesimal, spelled I-N-F-I-N-I-T-E-S-I-M-A-L.

Definition

  1. 1
    Incalculably, exceedingly, or immeasurably minute; vanishingly small.
  2. 2
    Of or pertaining to non-zero quantities whose magnitude is less than any positive rational number.
  3. 3
    Very small.

Recorded use

Wiktionary examples

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

  1. Do you ever get the feeling that you are but an infinitesimal speck, swallowed by the vastness of the universe and beyond?
  2. "You will conceive a bunch of grapes," said he, "which are covered by some infinitesimal but noxious bacillus."

Etymology

From New Latin īnfīnītēsimus + -al. Displaced earlier coordinate term fluxion.

Antonyms

infiniteenormous

This word in other languages

infinitesimal(Español)infinitésimal(Français)

Common misspellings

Also misspelled as:

  • ifninitesimal
  • inffinitesimal
  • infiintesimal
  • infinietsimal
  • infiniteismal
  • infinitesiaml
  • infinitesimall
  • infinitesimla
  • infinitesimmal
  • infinitesmial
  • infinitessimal
  • infinitseimal
  • infinittesimal
  • infinnitesimal
  • infintiesimal
  • infniitesimal
  • inifnitesimal
  • innfinitesimal
  • nifinitesimal

Misspelling Pattern Breakdown

How far each generated variant is from the correct spelling of infinitesimal - measured in single-character edits (insert, delete, or substitute a letter). Larger bars are easier to catch; one-edit slips are the sneakiest.

ifninitesimal2inffinitesimal1infiintesimal2infinietsimal2infiniteismal2infinitesiaml2infinitesimall1infinitesimla2
Edit distance from "infinitesimal"

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 "infinitesimal"?
"infinitesimal" is spelled I-N-F-I-N-I-T-E-S-I-M-A-L. The IPA pronunciation is /ˌɪnfɪnɪˈtɛsɪməl/.
What does "infinitesimal" mean?
As an adjective, "infinitesimal" means: Incalculably, exceedingly, or immeasurably minute; vanishingly small.
What are common misspellings of "infinitesimal"?
Common misspellings include "ifninitesimal", "inffinitesimal", "infiintesimal", "infinietsimal", "infiniteismal". The correct spelling is "infinitesimal".
How do you pronounce "infinitesimal"?
The IPA (International Phonetic Alphabet) transcription for "infinitesimal" is /ˌɪnfɪnɪˈtɛsɪməl/. 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 "infinitesimal"?
From New Latin īnfīnītēsimus + -al. Displaced earlier coordinate term fluxion. 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 "infinitesimal", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 13 letters (nearest by frequency rank).

dismemberment#45,333demonstrative#45,323reintegration#45,623renegotiation#45,625

Similar misspelling depth

Headwords with a similar count of attested misspellings (19 here; floor ≥5).

precondition19 variantsrepositioning19 variantssharpshooter19 variantsbewilderment19 variants

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

Source: FrequencyWords open word-frequency list