heatproof
adjective, verb
heatproof is spelled H-E-A-T-P-R-O-O-F: 9 letters. It appears about once in every 19 million words in written English, the 131,834th most frequent word form (wordfreq, 2021 data). As an adjective, heatproof means “insulating and incombustible” (English Wiktionary, September 2026).
How many letters and syllables are in heatproof?
| Letters | 9: H-E-A-T-P-R-O-O-F |
|---|---|
| In writing | about once in every 19 million words; the 131,834th most frequent word form |
| Wrong spellings searched | none measured in search |
Sources: letters and syllables from the English Wiktionary's hyphenation or pronunciation; written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
How common is heatproof?
Heatproof appears about once in every 19 million words in written English, the 131,834th 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).
Forms of heatproof
- more heatproof comparative
- most heatproof superlative
- heatproofs present, singular, he/she/it
- heatproofing participle, present
- heatproofed participle, past
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does heatproof mean?
The meanings the English Wiktionary records, quoted as written there (source below).
adjective
- 1
insulating and incombustible
For safety always use Bunsen burners on heatproof mats.
verb
- 1
To make insulating and incombustible.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Where does heatproof come from?
From heat + -proof.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).