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sesquipedalian

/ˌsɛskwɪpɪˈdeɪlɪən/

Using or containing unusually long, polysyllabic words

From Latin sesqui (One and a half times) + Latin pedal (Foot).

noun
adjective
sesqui
Classical Latin
Verified
sēsqui
One and a half times; increased by 50%

from Latin sesquipedalia "a foot-and-a-half long,"

+1 more source
Latin compound formation
Verified
sēsqui-
Combining form meaning “one and a half”

from Latin sesquipedalia "a foot-and-a-half long,"

+1 more source
pedal
Classical Latin
AI-inferred
pēs
Foot
Classical Latin
Verified
pedālis
Of the foot; measuring a foot

from Latin sēsquipedālis (literally “a foot and a half long”)

-ian
English word formation
AI-inferred
-ian
Adjective- and noun-forming suffix, meaning “relating to” or “a person associated with”
Combined
Latin sēsquipedālis
sēsqui- “one and a half” combines with pedālis “of the foot,” producing “a foot and a half long.”
English, 1610s
Verified
sesquipedalian
Noun: a person or thing a foot and a half long

from Latin sesquipedalia "a foot-and-a-half long,"

+1 more source
English, 1650s
Verified
sesquipedalian
Adjective: a word or expression metaphorically a foot and a half long

from Latin sesquipedalia "a foot-and-a-half long,"

+1 more source
English, 1830
Verified
sesquipedalian
Specifically associated with long, polysyllabic words

from Latin sesquipedalia "a foot-and-a-half long,"

+1 more source
Modern English
sesquipedalian

A sesquipedalian word is, in the most literal sense, long enough to stretch a foot and a half—an image of language turned into a measuring tape. The recipe comes from Latin: sēsqui meant “one and a half,” while pedālis meant “of the foot.” Horace made the phrase sesquipedalia verba famous in the first century BCE in his Ars Poetica, warning poets about “words a foot and a half long”—a wonderfully overgrown phrase that performs exactly what it describes. English first used sesquipedalian in the 1610s for something physically lengthy, then applied it to words by the 1650s. So when someone uses a towering term where a small one would do, the word itself arrives wearing linguistic platform shoes.

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