subgrade
noun
subgrade is spelled S-U-B-G-R-A-D-E: 8 letters. It appears about once in every 28 million words in written English, the 159,707th most frequent word form (wordfreq, 2021 data). As a noun, subgrade means “The layer of native soil on which the foundation of a road is laid” (English Wiktionary, September 2026). The plural of subgrade is subgrades.
How many letters and syllables are in subgrade?
| Letters | 8: S-U-B-G-R-A-D-E |
|---|---|
| In writing | about once in every 28 million words; the 159,707th 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 subgrade?
Subgrade appears about once in every 28 million words in written English, the 159,707th 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 subgrade
- subgrades plural
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does subgrade mean?
The meanings the English Wiktionary records, quoted as written there (source below).
noun
- 1
The layer of native soil on which the foundation of a road is laid.
- 2
A taxon ranking immediately below grade.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Subgrade in Spanish, French, German and Portuguese
In the sense layer of soil under the road:
| Language | Words |
|---|---|
| Spanish | subrasante |
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 subgrade come from?
From sub- + grade.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).