air filter
[ɛːɹ fɪltʰɚ]
"air-filter" is a 9-letter English headword indexed on PlainSpell.
The verdict
“air filter” is uncommon English (outside the top frequency list), classed as a noun. The kind of spelling people second-guess.
- Unranked
- below top-frequency English
- 10
- letters
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - A filter for removing dust and other particles from a stream of air, typically used in the air intake of an internal combustion engine, the output of an air compressor, the supply duct of a forced-...
| Property | Value |
|---|---|
| Headword | air filter |
| Language | English |
| Part of speech | Noun |
| IPA | [ɛːɹ fɪltʰɚ] |
| Letters | 10 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “air filter” sits in English frequency
Rare enough to double-check
air filter is uncommon English outside the top frequency list, classed as anoun, transcribed [ɛːɹ fɪltʰɚ]. Rarity is why readers land here mid-draft. Gloss: "A filter for removing dust and other particles from a stream of air, typically used in the air intake of an internal combustion engine, the output of an air compressor, the supply duct of a forced-...".
Zero misspellings are on record for air filter in our index, typically a sign the spelling maps closely to how the word sounds. It is not paired with a close-neighbour confusable in our dataset, a sign it's visually distinctive enough not to be mixed up with another word.
Wiktionary doesn't record an etymology for this headword, so its spelling pattern is best understood through pronunciation rather than a traceable origin. The correct English form is air filter, spelled A-I-R- -F-I-L-T-E-R.
Definition
- 1A filter for removing dust and other particles from a stream of air, typically used in the air intake of an internal combustion engine, the output of an air compressor, the supply duct of a forced-air furnace, etc.
This word in other languages
Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA). See the methodology for how each field is sourced and updated.
Frequently Asked Questions
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Using “air filter”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is A-I-R- -F-I-L-T-E-R - every other letter order is a misspelling in standard orthography.
- Say it as [ɛːɹ fɪltʰɚ] (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
- Browse more English words and confusable pairs in the same reference. English words
Data Source
Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Word ordering uses an open word-frequency list; misspelling variants are generated by edit-distance from the correct headword.