Standard Lemma guide

sesquipedalianism

noun · 2 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

  • UK: /sɛz.kwɪ.pəˈdɛl.i.ən.ɪsm̩/
  • US: /ˌsɛskwəpəˈdeɪli.ənɪzm̩/
  • US: Recorded audio is listed in the source snapshot.

1

noun

Meaning 1

The practice of using long, sometimes obscure, words in speech or writing.

Definition source: English Wiktionary via Wiktextract

Usage: uncountable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

A very long word.

Definition source: English Wiktionary via Wiktextract

Usage: countable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

Surface form analyzed as sesquipedalian + -ism, from sesqui- (“one and a half”) + pedalian (“of the foot”). From Latin sēsquipedālis (“a foot and a half long; in metaphorical use, “of an unnatural length, huge, big””), from sēsqui (“one and a half times as great”) + pedālis (“foot”).