filthy

/ˈfɪlθi/

//ˈfɪlθi// adj

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

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

The verdict

“filthy” has 10 generated spelling variants in the English index at frequency #9,608. The variants make it a useful spelling check.

#9,608
frequency rank, English
2,507
“F” headwords
10
tracked misspellings
9
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Covered with filth; very dirty.

Corpus desk

Index EN-filthy · filthy · English

filthy · rank #9,608 · 10 variants · 9 confusables

  • FREQ-COMMON #9,608
  • LEN-LONG 6 letters
  • VOW-2 2 vowels
  • CONFUS-MID 9 pairs
  • VAR-MID 10 variants
  • BOOK-MID 2,507
  • PHOTO-FINISH fatty

Nearest frequency peer: fatty (-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 “filthy”

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

corpus weight

What this shows “filthy” 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).

filthy vs fishy
67% similar
filthy vs firth
67% similar
filthy vs frothy
67% similar

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

Key facts for filthy
PropertyValue
Headwordfilthy
LanguageEnglish
Part of speechAdjective
IPA/ˈfɪlθi/
Letters6
Frequency rank#9,608
Misspellings tracked10
Confusable pairs9
SourceWiktionary (kaikki.org)

Frequency seat of misspelling magnet “filthy”

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).filthylands here:

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

Ticks step logarithmically, so each one marks a roughly tenfold drop in how often the word turns up. Same rarity band neighbours include “fatty” (#9,607), “fletcher” (#9,609), “extraction” (#9,606). Among 2,507 “F” headwords, “filthy” is #9,608. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 10 spelling variants around filthy (IPA /ˈfɪlθi/), anadjective. Corpus frequency is #9,608 among 2,507 “F” headwords. Wiktionary lists 4 senses, so context still picks the gloss.

Our generated misspelling index lists 10 likely wrong-spelling variants for filthy, with forms such as "ffilthy", "filhty", and "fillthy". 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 9 confusable-pair relationships, "fishy", "firth", "frothy", and more, where similar look or sound leads writers to substitute one word for another in context.

Etymologically, the entry records: From Middle English filthy, filthi, equivalent to filth + -y. The correct English form is filthy, spelled F-I-L-T-H-Y.

Definition

  1. 1
    Covered with filth; very dirty.
  2. 2
    Obscene or offensive.
  3. 3
    Very unpleasant or disagreeable.
  4. 4
    Angry; upset; severely annoyed.

Recorded use

Wiktionary examples

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

  1. The coaches were filthy outside and did not appear to have been painted or washed for years. Inside there were uncomfortable seats covered with a cane-like material.
  2. Filthy smirking Pat Robertson has come in second in the Iowa Republican caucuses.

Etymology

From Middle English filthy, filthi, equivalent to filth + -y.

Synonyms

sleazyslimygrimyhorrygruesomesmutty

Antonyms

pristineholyvenerable

This word in other languages

sucio(Español)crasseux(Français)dreckig(Deutsch)imundo(Português)

Common misspellings

Also misspelled as:

  • ffilthy
  • filhty
  • fillthy
  • filthhy
  • filthyy
  • filtthy
  • filtyh
  • fitlhy
  • flithy
  • iflthy

Misspelling Pattern Breakdown

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

ffilthy1filhty2fillthy1filthhy1filthyy1filtthy1filtyh2fitlhy2
Edit distance from "filthy"

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 "filthy"?
"filthy" is spelled F-I-L-T-H-Y. The IPA pronunciation is /ˈfɪlθi/.
What does "filthy" mean?
As an adjective, "filthy" means: Covered with filth; very dirty.
What words are commonly confused with "filthy"?
"filthy" is commonly confused with "fishy", "firth", "frothy". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
How do you pronounce "filthy"?
The IPA (International Phonetic Alphabet) transcription for "filthy" is /ˈfɪlθi/. 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 "filthy"?
From Middle English filthy, filthi, equivalent to filth + -y. 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 "filthy", not the corpus desk frequency band.

Same letter count

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

evolve#9,604Eugene#9,603ironic#9,621lacked#9,622

Similar misspelling depth

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

explode10 variantsaligned10 variantsweighed10 variantsundergo10 variants

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

Source: FrequencyWords open word-frequency list