At first glance, the dictionary seems pretty straightforward. Words are listed alphabetically, and you simply locate the right page and scan until you find the word you’re looking for. But there’s a lot you might not know about the dictionary, such as how new words are added and why Noah Webster learned Sanskrit to write his dictionary. So without further ado, read on to discover a dozen things you might not know about various dictionaries.

1. It takes a lot of work to add a new word to a dictionary.

very old dictionary cover
Housing Works Thrift Shops, Flickr // CC BY-SA 2.0

When people use a word or phrase frequently enough that it appears in widely read print and online publications, lexicographers take notice. First, they collect citations of the word, documenting the source it appeared in and recording its contextual meaning. Then, lexicographers conduct database research, searching for evidence that people from diverse backgrounds have used the word over a period of time. Finally, dictionary editors review the evidence and decide whether or not to include the new word in an upcoming edition of the dictionary. Thanks to this lengthy process, you can now find modern words such as manspread, presstitute, and athleisure in several dictionaries.

2. The first English dictionaries included difficult words.

Dictionary page with the word 'neanderthaloid.'
Quinn Dombrowski, Flickr // CC BY-SA 2.0

We think of dictionaries as comprehensive tomes containing everything from antelope and apple to zeitgeist and zootrophy, but early English dictionaries didn't contain any simple, common words. In the 16th and 17th centuries, thanks in part to the Renaissance's classical influence, English doubled its vocabulary by incorporating words from other languages. People needed to consult word lists to look up these new, difficult words that they hadn't heard before. In 1604, a teacher named Robert Cawdrey compiled a list of words into A Table Alphabeticall, which defined difficult English words borrowed from Latin, Greek, French, and Hebrew. Throughout the 17th century, other English men published lists of hard words with easy to understand definitions, and people turned to the dictionary to learn these words.

3. Noah Webster learned 26 languages to write his dictionary.

Handwritten drafts of dictionary entries by Noah Webster, circa 1790-1800.
Handwritten drafts of dictionary entries by Noah Webster, circa 1790-1800.
Wikimedia Commons, Public Domain

Although Noah Webster wasn't the first American to produce a dictionary, his name has become synonymous with the American dictionary. Hoping to help create a uniquely American lexicon, with Americanized spelling and pronunciation of words, Webster wrote An American Dictionary of the English Language. To thoroughly research word origins and sources, Webster got serious about becoming an etymology expert. He learned 26 languages, including Sanskrit and Old English, to write his dictionary. Published in 1828, it contained 70,000 entries and included the first definitions of "American" words such as chowder and skunk.

4. The first Merriam-Webster Dictionary cost $6.

Tattered page of an old dictionary.
GCShutter, iStock

After Webster died in 1843, George and Charles Merriam bought the rights to revise Webster's An American Dictionary of the English Language, Corrected and Enlarged. The two brothers printed and sold books in Springfield, Massachusetts, and their intellectual property purchase paid off. In the fall of 1847, the Merriams issued the first revised Webster dictionary for six dollars. The book sold well, and the G. & C. Merriam Co. was eventually renamed Merriam-Webster, Inc. in 1982. Merriam-Webster continues to publish popular print and electronic dictionaries today.

5. It took almost 50 years to create the Oxford English Dictionary.

Picture of a dinosaur in the dictionary.
huppypie, Flickr // CC BY-NC-ND 2.0

In 1857, the Philological Society of London first called for a comprehensive English language dictionary, including words from the 12th century to the present. In 1879, the Philological Society joined forces with Oxford University Press, and work commenced. In 1884, Oxford University Press published the first part of the dictionary (A to Ant), and the final volume was published in 1928. Called A New English Dictionary on Historical Principles, the dictionary listed more than 400,000 words and phrases. Today, the Oxford English Dictionary (OED) is one of the most respected and widely used dictionaries.

6. J.R.R. Tolkien researched word etymologies for the Oxford English Dictionary.

Phrase by JRR Tolkien
Corey Taratuta, Flickr // CC BY 2.0

After serving in World War I, J.R.R. Tolkien worked as an editor's assistant on the OED. His job was to research the etymologies of certain words that started with the letter w. Tolkien also composed multiple drafts of definitions for words such as waggle, walnut, walrus, and waistcoat. After his time at the OED, Tolkien went on to work as an English professor and write The Lord of the Rings. Subsequently, the OED has added terms that Tolkien himself coined, such as hobbit, mithril, and mathom.

7. Fake words sometimes make their way into a dictionary.

Magnifying glass looking at a dictionary.
Alessio_slo, iStock

Due to human error, a handful of fake words have appeared in dictionaries over the centuries. Some words, like phantomnation, which appeared in an 1864 edition of Webster's, are the result of missing hyphens. Others are typographical errors. A 1934 edition of Webster’s New International Dictionary defined dord as density, the result of confusion over spacing. Some dictionary editors have even intentionally included fake words, such as esquivalience in The New Oxford American Dictionary, to protect their copyright.

8. The Oxford English Dictionary needs your help.

Copies of the Oxford English Dictionary
mrpolyonymousvia, Flickr // CC BY 2.0

Although many scholars consider the OED to be the definitive authority on dictionaries, the OED needs your help. At any given time, the dictionary's editors are researching the history of certain words and phrases, and The OED Appeals allows the public to submit evidence (via the comments section) of the earliest record of certain words. Camouflage and Arnold Palmer are two entries that the OED has recently researched, so if you have old books or magazines that mention some weird word, let the OED know. You might just see your contribution in the dictionary's next edition.

9. Sample sentences from dictionaries can make interesting short stories.

A pair of reading glasses on a dictionary.
frankieleon, Flickr // CC BY 2.0

You might think that all those sample sentences in the dictionary are random, but you'd only be partially right. The phrases are deliberately chosen to show the word in a clear context with other words that it's often associated with, and are ideally so boring that you don't even think twice about them. Illustrator Jez Burrows has connected these random sentences from the New Oxford American Dictionary into short stories. "Often I’ll find at least one [word] that makes a good jumping-off point and I’ll start to flesh out some sort of vague narrative, then work backwards to imagine what sort of words might give rise to the sentences I'm looking for," Burrows said of his process.

10. There are a lot of weird dictionaries in existence.

row of dictionaries
Liz West, Flickr // CC BY 2.0

Although most people are familiar with Webster, the OED, and, there are plenty of obscure or downright bizarre dictionaries. For example, you can find plenty of rhyming dictionaries and reverse dictionaries (that are organized by a theme rather than alphabetized). Scrolling through Wye's Dictionary Of Improbable Words: All-Vowel Words And All-Consonant Words might help you find some uncommon words to win your next Scrabble game. And Mrs. Byrne's Dictionary of Unusual, Obscure, and Preposterous Words contains weird English words that have appeared in at least one dictionary in the past. For example, you might learn that junkettaceous means worthless and cuggermugger means whispered gossiping.

11. Urban Dictionary capitalizes on being a slang haven.

Entry in the Urban Dictionary
Terry Freedman, Flickr // CC BY-NC-ND 2.0

Urban Dictionary, the online, crowdsourced listing of millions of slang words and phrases, is beloved by middle schoolers and anyone trying to understand the latest slang terms. But Urban Dictionary is more than a dictionary. It also has an online store that sells mugs, T-shirts, an official card game, and plush dolls inspired by dirty phrases that the dictionary has helped to popularize (like Golden Shower and Donkey Punch). If you're unfamiliar with the definitions of those disgusting phrases, we'll let you look them up, but don’t say we didn't warn you.

12. A California school district considered banning Merriam-Webster's Collegiate Dictionary.

mrd00dman, Flickr // CC BY-NC 2.0

In 2010, a school district in Southern California temporarily removed all copies of the Merriam-Webster 10th Collegiate Edition from elementary school classrooms. Why remove the dictionary? After a parent told the principal of Oak Meadows Elementary School that the dictionary contained an explicit definition of a sex act, the school district decided to remove the books. A committee of teachers, administrators, and parents decided that the dictionary was age-appropriate, and the copies of Merriam-Webster were returned to the classroom. Here's hoping that parent never discovers Urban Dictionary!

A version of this story first ran in 2016.