substring
noun, verb
substring is spelled S-U-B-S-T-R-I-N-G: 9 letters. It appears about once in every 13 million words in written English, the 110,368th most frequent word form (wordfreq, 2021 data). As a noun, substring means “A (possibly zero-length) string of characters that is contained in another string” (English Wiktionary, September 2026). The plural of substring is substrings.
How many letters and syllables are in substring?
| Letters | 9: S-U-B-S-T-R-I-N-G |
|---|---|
| In writing | about once in every 13 million words; the 110,368th 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 substring?
Substring appears about once in every 13 million words in written English, the 110,368th 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 substring?
- 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-substring.wav, Wikimedia Commons (author and licence on each file's page).
Forms of substring
- substrings plural, present, singular, he/she/it
- substringing participle, present
- substringed participle, past
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does substring mean?
The meanings the English Wiktionary records, quoted as written there (source below).
noun
- 1
A (possibly zero-length) string of characters that is contained in another string.
The substrings of "button" include "butt", "ton", and "on".
verb
- 1
To extract a substring from.
- 2
To take as a substring.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Substring in Spanish, French, German and Portuguese
In the sense string of characters:
| Language | Words |
|---|---|
| German | Teilstring, Teilzeichenkette |
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 substring come from?
From sub- + string.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).