# filthy

> English word · Adjective · IPA /ˈfɪlθi/ · frequency rank #9,608

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

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

## Easily confused with
- **fishy** (https://plainspell.com/en/vs/filthy-vs-fishy)
- **firth** (https://plainspell.com/en/vs/filthy-vs-firth)
- **frothy** (https://plainspell.com/en/vs/filthy-vs-frothy)
- **fifth** (https://plainspell.com/en/vs/fifth-vs-filthy)
- **fifty** (https://plainspell.com/en/vs/fifty-vs-filthy)
- **filth** (https://plainspell.com/en/vs/filth-vs-filthy)
- **filly** (https://plainspell.com/en/vs/filly-vs-filthy)
- **filter** (https://plainspell.com/en/vs/filter-vs-filthy)
- **fifths** (https://plainspell.com/en/vs/fifths-vs-filthy)

## Common misspellings (10)
`ffilthy`, `filhty`, `fillthy`, `filthhy`, `filthyy`, `filtthy`, `filtyh`, `fitlhy`, `flithy`, `iflthy`

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/filthy