underdrain
noun, verb
underdrain is spelled U-N-D-E-R-D-R-A-I-N: 10 letters. It appears about once in every 95 million words in written English, the 313,259th most frequent word form (wordfreq, 2021 data). As a noun, underdrain means “An underground drain or trench with openings through which the water may percolate from the soil or ground above” (English Wiktionary, September 2026). The plural of underdrain is underdrains.
How many letters and syllables are in underdrain?
| Letters | 10: U-N-D-E-R-D-R-A-I-N |
|---|---|
| In writing | about once in every 95 million words; the 313,259th 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 underdrain?
Underdrain appears about once in every 95 million words in written English, the 313,259th 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 underdrain?
- US
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Recordings: LL-Q1860_(eng)-Flame,_not_lame-underdrain.wav, Wikimedia Commons (author and licence on each file's page).
Forms of underdrain
- underdrains plural, present, singular, he/she/it
- underdraining participle, present
- underdrained participle, past
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does underdrain mean?
The meanings the English Wiktionary records, quoted as written there (source below).
noun
- 1
An underground drain or trench with openings through which the water may percolate from the soil or ground above.
verb
- 1
To drain by forming an underdrain or underdrains in.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Where does underdrain come from?
From under- + drain.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).