IRS
/ˈaɪ.ɑɹ.ɛs/noun
IRS is spelled I-R-S: 3 letters and 3 syllables. It appears 7.8 times per million words in written English, the 8,417th most frequent word form (wordfreq, 2021 data). As a noun, IRS means “Initialism of inertial reference system” (English Wiktionary, September 2026). The plural of IRS is IRSs.
How many letters and syllables are in IRS?
| Letters | 3: I-R-S |
|---|---|
| Syllables | 3 (from its American pronunciation) |
| In writing | 7.8 times per million words; the 8,417th most frequent word form |
| Wrong spellings searched | none measured in search |
Sources: letters and syllables from the English Wiktionary's hyphenation or pronunciation and the CMU Pronouncing Dictionary; written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
How common is IRS?
IRS appears 7.8 times per million words in written English, the 8,417th most frequent word form in the list.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
How do you pronounce IRS?
- US /ˈaɪ.ɑɹ.ɛs/
IRS has 3 syllables (counted from its American pronunciation in the CMU Pronouncing Dictionary).
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Forms of IRS
- IRSs plural
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does IRS mean?
The meanings the English Wiktionary records, quoted as written there (source below).
noun
- 1
Initialism of inertial reference system.
- 2
Initialism of Interface Requirements Specification.
- 3
Initialism of instant replay system.
- 4
Initialism of interest rate swap.
noun
- 1
plural of IR
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).