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PlainSpell

sir

/sɜɹ/noun, verb

sir is spelled S-I-R: 3 letters and one syllable. It appears 115 times per million words in written English, the 932nd most frequent word form (wordfreq, 2021 data). People search “ser vs sir” about 1,300 times a month (Google, United States). As a noun, sir means “A man of a higher rank or position” (English Wiktionary, September 2026). The plural of sir is sirs.

How many letters and syllables are in sir?

Letters3: S-I-R
Syllables1 (from its American pronunciation)
In writing115 times per million words; the 932nd most frequent word form
Wrong spellings searchednone measured in search
Pairs people search
Rhymes with

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); Bing searches in the United States: the average month from September 2025 to August 2026 (Microsoft Advertising keyword data through DataForSEO, read September 30, 2026); rhymes and same-letter words are computed by PlainSpell from its own word list.

How common is sir?

Sir appears 115 times per million words in written English, the 932nd 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 sir?

  • UK /sɜː/
  • US /sɜɹ/
  • /sɪɾ/

Sir has one syllable (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). Recordings: En-us-sir.ogg, Wikimedia Commons (author and licence on each file's page).

Words people confuse with sir

Word pairs people search, with the monthly searches for “a vs b” (G: Google, B: Bing, United States).

ser vs sir1,300 G

Also written: aye aye, Sir, ma'am, this is a Wendy's, ma'am, this is an Arby's, ser, sir, this is a Wendy's.

Sources: Google and Bing searches (September 2025 to August 2026, through DataForSEO); English Wiktionary (homophones, alternative spellings).

What rhymes with sir?

The 12 most written words on PlainSpell end in the same sounds as sir from its last stressed vowel (/ɜɹ/):

Computed by PlainSpell from the pronunciations in the English Wiktionary (dump of September 2, 2026): a rhyme shares every sound from the last stressed vowel to the end; ordered by written frequency (wordfreq 3.1).

Forms of sir

  • sirs plural, present, singular, he/she/it
  • saar
  • sirring participle, present
  • sirred participle, past

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).

What does sir mean?

The meanings the English Wiktionary records, quoted as written there (source below).

noun

  1. 1

    A man of a higher rank or position.

  2. 2

    A respectful term of address to a man of higher rank or position, particularly

  3. 3

    to a knight or other low member of the peerage.

    Just be careful. He gets whingy now if you don't address him as Sir John.

  4. 4

    to a superior military officer.

    Sir, yes sir.

  5. 5

    to a teacher.

    Here's my report, sir.

  6. 6

    A respectful term of address to an adult male (often older), especially if his name or proper title is unknown.

    Excuse me, sir, do you know the way to the art museum?

verb

  1. 1

    informalTo address another individual using "sir".

    Sir, yes, sir! –Don't you sir me, private! I work for a living!

noun

as Sir
  1. 1

    Alternative letter-case form of sir.

  2. 2

    UKThe titular prefix given to a knight or baronet.

  3. 3

    colloquialinformalA respectful term of address or reference to a man of higher rank or position before the man's given name or nickname.

noun

as SIR
  1. 1

    Initialism of surface insulation resistance.

  2. 2

    Abbreviation of silent information regulator.

adjective

as SIR
  1. 1

    Initialism of susceptible-infected/infectious-removed/recovered.

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).

Sir in Spanish, French, German and Portuguese

LanguageWords
Portuguesesenhor (man of a higher rank or position), dom, dona (title of a nobleman)
Frenchmadame (title of a nobleman), monsieur (address to any male, especially if his name or…), vouvoyer (to address (someone) using "sir")
GermanHerr, mein Herr (address to any male, especially if his name or…), Siezen (to address (someone) using "sir")
Spanishdon, doña (title of a nobleman), señor (address to any male, especially if his name or…)

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Translations are Wiktionary's, by sense; a linked word has its own PlainSpell page.

Where does sir come from?

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.

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).

What to look up after sir