Word of the Day: Sesquipedalian — Meaning, origin and how to use it

The English language is filled with words that are surprisingly long, but few are as fitting as sesquipedalian. Ironically, the word itself is long enough to prove its own point.

Although it isn't commonly used in everyday conversation, sesquipedalian is a favourite among writers, editors and language enthusiasts. It describes people, writing or speech that uses long words—sometimes impressively, and sometimes unnecessarily.

Today's Word of the Day: Sesquipedalian

Sesquipedalian is an adjective used to describe 'someone who uses long words', or writing and speech that is filled with lengthy, complex vocabulary.


Depending on the context, the word can be complimentary, suggesting an impressive vocabulary, or mildly critical, implying that someone is using overly complicated language when simpler words would do.

The word comes from the Latin 'sesquipedalis', meaning "a foot and a half long." The Roman poet Horace famously advised writers to avoid 'sesquipedalia verba'—literally, "words a foot and a half long."

Meaning of Sesquipedalian

Sesquipedalian (adjective)
Pronunciation: ses-kwih-pi-DAY-lee-un
Meaning: Characterised by the use of long words; a person who habitually uses long or complex words.

Example sentences

* The professor's sesquipedalian lectures left many students reaching for a dictionary.
* His sesquipedalian writing impressed critics but confused casual readers.
* You don't need to sound sesquipedalian to communicate your ideas effectively.

Synonyms
* Verbose
* Long-winded
* Grandiloquent
* Pompous (in some contexts)
* Wordy

Why is Sesquipedalian unique?

Few English words are as self-descriptive as sesquipedalian. It is often cited as one of the best examples of linguistic irony because the word meaning "long word" is itself a long word.

The term is frequently used in discussions about writing style, public speaking and communication. While a rich vocabulary can make writing more engaging, excessive use of long words can sometimes make ideas harder to understand.

Did you know?

The word sesquipedalian has been part of the English language since the 17th century. Today, it is commonly used by editors, teachers and language lovers to describe writing that relies heavily on complex vocabulary. It also serves as a reminder that effective communication isn't about using the longest words—it's about choosing the right ones.