sir
/sɜː(ɹ)/
"sir" is a 3-letter English headword indexed on PlainSpell.
The verdict
“sir” sits in 20 confusable pairs (corpus #934) as a noun. The look-alike neighbours are the real trap.
- #934
- frequency rank, English
- 6,566
- “S” headwords
- 20
- confusable pairs
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - A man of a higher rank or position.
Corpus desk
Index EN-sir · sir · English
sir · rank #934 · 0 variants · 20 confusables
- FREQ-CORE #934
- LEN-MID 3 letters
- VOW-1 1 vowel
- CONFUS-HIGH 20 pairs
- VAR-0 0 variants
- BOOK-DENSE 6,566
- PHOTO-FINISH sea
Nearest frequency peer: sea (-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.
Frequency neighbourhood for “sir”
Lower corpus rank = more everyday usage (inverted bar length for readability)
- practice
practice
99,070 corpus weight
- rules
rules
99,069 corpus weight
- sea
sea
99,068 corpus weight
- sir
sir
99,067 corpus weight
- success
success
99,066 corpus weight
- towards
towards
99,065 corpus weight
What this shows Bars show where “sir” sits against the nearest ranked English headwords in the FrequencyWords band, not a reprint of letter-browse containment.
Visual similarity to commonly confused words
How many letter changes separate each confused pair (Levenshtein distance, normalized).
Source: PlainSpell confusable corpus (Wiktionary, CC BY-SA).
| Property | Value |
|---|---|
| Headword | sir |
| Language | English |
| Part of speech | Noun |
| IPA | /sɜː(ɹ)/ |
| Letters | 3 |
| Frequency rank | #934 |
| Misspellings tracked | 0 |
| Confusable pairs | 20 |
| Source | Wiktionary (kaikki.org) |
Where “sir” sits in English frequency
Easy to mix with look-alikes
The spelling risk for sir is neighbouring look-alikes ("so", "SS", …), not just typos; it is anoun pronounced /sɜː(ɹ)/. Frequency #934 among 6,566 “S” headwords. 6 recorded senses keep meaning in play.
sir has no tracked misspelling variants, since its letter pattern doesn't lend itself to common typo substitutions. It also participates in 20 confusable-pair relationships, "so", "SS", "SP", and more, since the words sound or look close enough that writers reach for the wrong one mid-sentence.
Etymologically, the entry records: From Middle English sir, unstressed form of sire, borrowed from Old French sire (“master, sir, lord”), from Latin senior (“older, elder”), from senex (“old”). Doublet of seigneur, seignior, senhor, senior, señor, senyor, signore, and sire. The correct English form is sir, spelled S-I-R.
Definition
- 1A man of a higher rank or position.
- 2A respectful term of address to a man of higher rank or position, particularly
- 3A respectful term of address to a man of higher rank or position
- 4A respectful term of address to a man of higher rank or position
- 5A respectful term of address to a man of higher rank or position
- 6A respectful term of address to an adult male (often older), especially if his name or proper title is unknown.
Recorded use
Wiktionary examplesThese source excerpts show how sir appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
Jeeves: Foreign travel often liberates emotions best kept in check, sir. The air of North America is notoriously stimulating in this regard, as witness the regrettable behavior of its inhabitants in 1776. B. Wooster: Hm? What happened in 1776, Jeeves? Jeeves: I prefer not to dwell on it, if it's convenient to you, sir.
Just be careful. He gets whingy now if you don't address him as Sir John.
Etymology
From Middle English sir, unstressed form of sire, borrowed from Old French sire (“master, sir, lord”), from Latin senior (“older, elder”), from senex (“old”). Doublet of seigneur, seignior, senhor, senior, señor, senyor, signore, and sire.
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); frequency ordering uses the FrequencyWords open word-frequency list (2018 English corpus, MIT). See the methodology for how each field is sourced and updated.
PlainSpell is rendered directly from structured Wiktionary extracts and open word-frequency lists, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of September 3, 2026. Primary sources: Wiktionary (via kaikki.org) and FrequencyWords.
Frequently Asked Questions
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Similar English words by spelling shape
Same letter count and similar misspelling depth for "sir", not the corpus desk frequency band.
What to do next
You've looked up "sir". Here's where to go from here.
- "sir" maps to 20 confusable pairs in this vintage; the highest-scored is "so". View pair
- Usage frequency rank #934 among English headwords in this corpus. Corpus statistics
- Browse more English words in the "S" letter cohort. S–Z browse
- PlainSpell rotates a curated Word of the Day from the English corpus, a passive way to discover vocabulary. Word of the Day
PlainSpell is a reference corpus, not spelling advice. Verify unusual forms in context.
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.