insubstantial
adjective
insubstantial is spelled I-N-S-U-B-S-T-A-N-T-I-A-L: 13 letters and 4 syllables. It appears about once in every 4 million words in written English, the 62,179th most frequent word form (wordfreq, 2021 data). As an adjective, insubstantial means “Lacking substance; not real or strong” (English Wiktionary, September 2026).
How many letters and syllables are in insubstantial?
| Letters | 13: I-N-S-U-B-S-T-A-N-T-I-A-L |
|---|---|
| Syllables | 4 (from its American pronunciation) |
| In writing | about once in every 4 million words; the 62,179th most frequent word form |
| Wrong spellings searched | none measured in search |
Sources: letters and syllables from the English Wiktionary's hyphenation or pronunciation and the CMU Pronouncing Dictionary; written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
How common is insubstantial?
Insubstantial appears about once in every 4 million words in written English, the 62,179th most frequent word form in the list.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
How do you pronounce insubstantial?
Insubstantial has 4 syllables (counted from its American pronunciation in the CMU Pronouncing Dictionary).
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Forms of insubstantial
- more insubstantial comparative
- most insubstantial superlative
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does insubstantial mean?
The meanings the English Wiktionary records, quoted as written there (source below).
adjective
- 1
Lacking substance; not real or strong.
The bridge was insubstantial and would not safely carry a car.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Insubstantial in Spanish, French, German and Portuguese
In the sense Translations:
| Language | Words |
|---|---|
| French | insubstantiel |
| Portuguese | insubstancial |
| Spanish | hueco, insustancial, vacío |
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Translations are Wiktionary's, by sense; a linked word has its own PlainSpell page.
Where does insubstantial come from?
Probably from Middle French insubstantiel, from Latin insubstantiālis, from in- + substantiālis. By surface analysis, in- + substantial.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).