subtend
/sʌbˈtɛnd/
"subtend" is a 7-letter English headword indexed on PlainSpell.
The verdict
“subtend” is outside the top-ranked English vocabulary, used as a verb - the kind of word writers most often double-check.
- Unranked
- below top-frequency English
- 7
- letters
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - To use an angle to delimit (mark off, enclose) part of a straight or curved line, for example an arc or the opposite side of a triangle.
| Property | Value |
|---|---|
| Headword | subtend |
| Language | English |
| Part of speech | Verb |
| IPA | /sʌbˈtɛnd/ |
| Letters | 7 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “subtend” sits in English frequency
Spelling & Dictionary Insight
The English entry for subtend is 7 letters long, classified as a verb, and transcribed in the International Phonetic Alphabet as /sʌbˈtɛnd/. It sits outside the most-frequent rank tiers, which is often why uncommon words generate more spelling variants per reader. Wiktionary records 4 distinct senses for this headword, so context determines which meaning a reader should apply.
We couldn't generate a plausible misspelling set for subtend, since its letter sequence doesn't invite the usual edit-distance slips. Our dataset records no confusable match here, which usually means its spelling is distinct enough that readers don't reach for a similar-looking word instead.
Etymologically, the entry records: From Latin subtendere, from sub (“under”) + tendere (“to stretch, extend”), itself a semantic loan from Ancient Greek ὑποτείνω (hupoteínō, “to subtend”), from which hypotenuse also derives. See tend. The correct English form is subtend, spelled S-U-B-T-E-N-D.
Definition
- 1To use an angle to delimit (mark off, enclose) part of a straight or curved line, for example an arc or the opposite side of a triangle.
- 2To extend or stretch opposite something; to be part of a straight or curved line that is opposite to and delimits an angle.
- 3To form the central angle of a circle underneath an arc.
- 4To stand beneath or close to, as a bract at the base of a flower.
Etymology
From Latin subtendere, from sub (“under”) + tendere (“to stretch, extend”), itself a semantic loan from Ancient Greek ὑποτείνω (hupoteínō, “to subtend”), from which hypotenuse also derives. See tend.
This word in other languages
Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA). See the methodology for how each field is sourced and updated.
Frequently Asked Questions
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Using “subtend”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is S-U-B-T-E-N-D - every other letter order is a misspelling in standard orthography.
- Say it as /sʌbˈtɛnd/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
- Browse more English words and confusable pairs in the same reference. English words
Data Source
Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Word ordering uses an open word-frequency list; misspelling variants are generated by edit-distance from the correct headword.