arachno-
"arachno" is a 7-letter English headword indexed on PlainSpell.
The verdict
“arachno-” is uncommon English (outside the top frequency list), classed as a prefix. The kind of spelling people second-guess.
- Unranked
- below top-frequency English
- 8
- letters
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Arachnid; arachnidial; spider.
| Property | Value |
|---|---|
| Headword | arachno- |
| Language | English |
| Part of speech | Prefix |
| Letters | 8 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “arachno-” sits in English frequency
Rare enough to double-check
arachno- is uncommon English outside the top frequency list, classed as aprefix. Rarity is why readers land here mid-draft. 2 senses are on record.
No misspelling variants are generated for arachno- in our index, since its letter sequence doesn't invite the usual edit-distance slips. This headword has no recorded confusable partner, since nothing in our dataset looks or sounds close enough to cause mix-ups.
Etymologically, the entry records: From international scientific vocabulary, reflecting a New Latin combining form, from Ancient Greek ἀράχνη (arákhnē, “spider”). By surface analysis, arachn- + -o-. Piecewise doublet of araneo-. The correct English form is arachno-, spelled A-R-A-C-H-N-O--.
Definition
- 1Arachnid; arachnidial; spider.
- 2A boron structure intermediate between nido- and hypho- in degree of openness.
Etymology
From international scientific vocabulary, reflecting a New Latin combining form, from Ancient Greek ἀράχνη (arákhnē, “spider”). By surface analysis, arachn- + -o-. Piecewise doublet of araneo-.
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 “arachno-”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is A-R-A-C-H-N-O-- - every other letter order is a misspelling in standard orthography.
- 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.