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[The Fascinating Origins of 'Dozen' Phrases and the Complexity of Pluralizing Words Ending in 'O']-[What is a baker’s dozen? Making O-words plural. Wrong pew.]

Grammar Girl Quick and Dirty Tips for Better Writing · B2 · 2026-01-20

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📋 Summary

The Origins and Evolution of 'Dozen' Phrases

In this episode, Grammar Girl explores the linguistic history behind various idioms involving the word "dozen." The most prominent of these is the "baker's dozen," which refers to the number 13. Contrary to the myth of baker generosity, this tradition was rooted in strict medieval regulations like the "Assize of Bread and Ale Act." Bakers faced harsh penalties—including fines and the pillory—for selling underweight loaves. To avoid these punishments, they often included a 13th loaf as a buffer against moisture loss during baking, a practice that also provided a profit margin for middlemen.

Other variations of the number 13 include the "devil's dozen," which linguist Anatoly Lieberman suggests stems from the historical association between bakers' bad reputations and "devilry." Additionally, terms like "long dozen" and "printer's dozen" have emerged over time, the latter being a practice where printers provided 13 copies for every 12 ordered to account for potential damage or quality control issues.

Beyond the number 13, the podcast highlights other dozen-related idioms:

  • "Nineteen to the dozen": Used to describe rapid activity or speech, implying someone is cramming more than the standard amount into a set space.
  • "Banker's dozen": A tongue-in-cheek reference to the number 11, playing on the stereotype of bankers as stingy individuals who "shortchange" their customers.
  • "Daily dozen": Originally a 1919 workout routine by Yale coach Walter Camp, the term has evolved to describe any set of daily tasks or routines, famously repurposed by Dr. Michael Greger as a list of 12 essential foods for health.

The Complexity of Pluralizing Nouns Ending in 'O'

Grammar Girl also addresses the frustrating inconsistency in English spelling, specifically regarding plurals of nouns ending in "O." The general rule suggests adding "-s" for words ending in a vowel + "o" (e.g., radio, ratio) and "-es" for those ending in a consonant + "o" (e.g., tomato, potato).

However, this rule is riddled with exceptions. Words like photos (short for photographs) and solos take an "-s" despite ending in a consonant. Some suggest that shortened words or musical terms tend to favor "-s," but even this is inconsistent. Certain words, such as banjos, zeros, and torpedoes, allow for both "-s" and "-es" endings.

Ultimately, the podcast concludes that the English language has borrowed so extensively from other tongues—such as Spanish (rodeo, tomato) and Italian (piano)—that a unified rule is non-existent. As linguistics professor Natalie Schilling notes, spelling has historically been inconsistent, with figures like Noah Webster further complicating matters by attempting to differentiate American English from British standards. Today, when in doubt, the only reliable approach is to consult a dictionary, as the history of English spelling is characterized by exceptions and "alternate spellings" rather than rigid logic.

🎯Key Sentences

1
So what is going on?
2
Well, not exactly.
3
This works to an extent.
4
it's hard to draw a line between what counts as an English word and what counts as a borrowing.
5
Who cares if you spell banjos with S or ES?
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📝Key Phrases

1
throw in
2
shortchange
3
profit margin
4
talk a mile a minute
5
play on
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📖 Transcript

Grammar Girl here.
I'm Mignon Fogarty, your friendly guide to the English language.
Today we're going to talk about why we use the phrase baker's dozen and how to make words that end in O plural.
I recently encountered the phrase baker's dozen and wondered where it came from.
Well first, a dozen is twelve, and the word goes back to the Latin duodecima, which was formed from the words for two and ten.
So it also meant twelve.

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