Standard Lemma guide

insubstantial

adj · 3 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

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  • CMU ARPABET: IH2 N S AH0 B S T AE1 N SH AH0 L Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

adj

Meaning 1

Lacking substance; not real or strong.

Definition source: English Wiktionary via Wiktextract

Examples

  • The bridge was insubstantial and would not safely carry a car.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

adjective

Meaning 2

lacking material form or substance; unreal

Definition source: Princeton WordNet 3.0

Examples

  • as insubstantial as a dream
  • an insubstantial mirage on the horizon

Meaning relationships

Synonyms: unsubstantial, unreal

Antonyms: substantial

3

adjective satellite

Meaning 3

lacking in nutritive value

Definition source: Princeton WordNet 3.0

Examples

  • the jejune diets of the very poor

Meaning relationships

Synonyms: jejune

Antonyms: none provided

History

Etymology

Probably from Middle French insubstantiel, from Latin insubstantiālis, from in- + substantiālis. By surface analysis, in- + substantial.

Across languages

Translations

15 source translations are retained for this English entry.

  • Bulgarian: нематериален (nematerialen) — Translations
  • Bulgarian: нереален (nerealen) — Translations
  • Catalan: insubstancial — Translations
  • French: insubstantiel — Translations
  • Galician: insubstancial — Translations
  • Italian: immateriale — Translations
  • Italian: inconsistente — Translations
  • Japanese: 実のない (minonai) — Translations
  • Māori: korekiko — Translations
  • Māori: kikokore — Translations
  • Portuguese: insubstancial — Translations
  • Romanian: nesubstanțial — Translations
  • Spanish: hueco — Translations
  • Spanish: insustancial — Translations
  • Spanish: vacío — Translations
Real reading context

insubstantial in complete knowledge articles