opacity

/oʊˈpæsɪti/

//oʊˈpæsɪti// noun

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

"opacity" is a 7-letter English headword indexed on PlainSpell.

The verdict

“opacity” has 10 generated spelling variants in the English index at frequency #35,441. The variants make it a useful spelling check.

#35,441
frequency rank, English
1,431
“O” headwords
10
tracked misspellings

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - The state or quality of being opaque, not allowing light to pass through.

Corpus desk

Index EN-opacity · opacity · English

opacity · rank #35,441 · 10 variants · 0 confusables

  • FREQ-MID #35,441
  • LEN-LONG 7 letters
  • VOW-4 4 vowels
  • CONFUS-0 No pairs
  • VAR-MID 10 variants
  • BOOK-MID 1,431
  • PHOTO-FINISH oneness

Nearest frequency peer: oneness (-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 “opacity”

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

corpus weight

What this shows “opacity” 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 opacity
PropertyValue
Headwordopacity
LanguageEnglish
Part of speechNoun
IPA/oʊˈpæsɪti/
Letters7
Frequency rank#35,441
Misspellings tracked10
Confusable pairs0
SourceWiktionary (kaikki.org)

Frequency seat of misspelling magnet “opacity”

Every-word frequency runs from the handful of words we use constantly (left) to the long tail used once in a blue moon (right).opacitylands 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 “oneness” (#35,440), “opp” (#35,442), “OMFG” (#35,439). Among 1,431 “O” headwords, “opacity” is #35,441. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 10 spelling variants around opacity (IPA /oʊˈpæsɪti/), anoun. Corpus frequency is #35,441 among 1,431 “O” headwords. Wiktionary lists 4 senses, so context still picks the gloss.

Our generated misspelling index lists 10 likely wrong-spelling variants for opacity, with forms such as "oapcity", "opaccity", and "opacitty". 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, suggesting its spelling stands apart enough that readers rarely confuse it with something else.

Etymologically, the entry records: From opaque + -ity, from French opacité, from Latin opacitas. The correct English form is opacity, spelled O-P-A-C-I-T-Y.

Definition

  1. 1
    The state or quality of being opaque, not allowing light to pass through.
  2. 2
    The state or quality of being inaccessible to understanding.
  3. 3
    A measure of relative impenetrability to electromagnetic radiation such as light.
  4. 4
    An opaque area.

Recorded use

Wiktionary examples

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

  1. We could not see the sandbar due to the opacity of the muddy water.
  2. The opacity of these decisions is troubling.

Etymology

From opaque + -ity, from French opacité, from Latin opacitas.

Synonyms

nontransparencyopaqueness

This word in other languages

opacidad(Español)opacité(Français)Opazität(Deutsch)opacidade(Português)

Common misspellings

Also misspelled as:

  • oapcity
  • opaccity
  • opacitty
  • opacityy
  • opaciyt
  • opactiy
  • opaicty
  • opcaity
  • oppacity
  • poacity

Misspelling Pattern Breakdown

How far each generated variant is from the correct spelling of opacity - 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.

oapcity2opaccity1opacitty1opacityy1opaciyt2opactiy2opaicty2opcaity2
Edit distance from "opacity"

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 "opacity"?
"opacity" is spelled O-P-A-C-I-T-Y. The IPA pronunciation is /oʊˈpæsɪti/.
What does "opacity" mean?
As a noun, "opacity" means: The state or quality of being opaque, not allowing light to pass through.
What are common misspellings of "opacity"?
Common misspellings include "oapcity", "opaccity", "opacitty", "opacityy", "opaciyt". The correct spelling is "opacity".
How do you pronounce "opacity"?
The IPA (International Phonetic Alphabet) transcription for "opacity" is /oʊˈpæsɪti/. 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 "opacity"?
From opaque + -ity, from French opacité, from Latin opacitas. 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 "opacity", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 7 letters (nearest by frequency rank).

oneness#35,440Nutella#35,435picnics#35,458mooring#35,415

Similar misspelling depth

Headwords with a similar count of attested misspellings (10 here; floor ≥5).

justly10 variantsIshmael10 variantssneaked10 variantsimplore10 variants

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

Source: FrequencyWords open word-frequency list