ses·​qui·​pe·​da·​lian ˌse-skwə-pə-ˈdāl-yən How to pronounce sesquipedalian (audio)
: having many syllables : long
sesquipedalian terms
: given to or characterized by the use of long words
a sesquipedalian television commentator

Did you know?

Horace, the ancient Roman poet known for his satire, was merely being gently ironic when he cautioned young poets against using sesquipedalia verba—"words a foot and a half long"—in his book Ars poetica, a collection of maxims about writing. But in the 17th century, English literary critics decided the word sesquipedalian could be very useful for lambasting writers using unnecessarily long words. Robert Southey used it to make two jibes at once when he wrote "the verses of [16th-century English poet] Stephen Hawes are as full of barbarous sesquipedalian Latinisms, as the prose of [the 18th-century periodical] the Rambler." The Latin prefix sesqui- is used in modern English to mean "one and a half times," as in sesquicentennial (a 150th anniversary).

Word History


Latin sesquipedalis, literally, a foot and a half long, from sesqui- + ped-, pes foot — more at foot

First Known Use

1656, in the meaning defined at sense 1

Time Traveler
The first known use of sesquipedalian was in 1656


Dictionary Entries Near sesquipedalian

Cite this Entry

“Sesquipedalian.” Dictionary, Merriam-Webster, Accessed 24 Apr. 2024.

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