arduo
[ˈaɾð̞wo]
The verdict
“arduo” is a moderately-common Spanish word, ranked #21,901 in Spanish word frequency and used as an adjective.
- #21,901
- frequency rank, Spanish
- 5
- letters
- 6
- tracked misspellings
- 20
- confusable pairs
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Muy complicado.
Visual similarity to commonly confused words
How many letter changes separate each confused pair (Levenshtein distance, normalized).
Source: PlainSpell confusable corpus (Wiktionary, CC BY-SA).
| Property | Value |
|---|---|
| Headword | arduo |
| Language | Spanish |
| Part of speech | Adjective |
| IPA | [ˈaɾð̞wo] |
| Letters | 5 |
| Frequency rank | #21,901 |
| Misspellings tracked | 6 |
| Confusable pairs | 20 |
| Source | Wiktionary (kaikki.org) |
Where “arduo” sits in Spanish frequency
Spelling & Dictionary Insight
The Spanish entry for arduo is 5 letters long, classified as an adjective, and transcribed in the International Phonetic Alphabet as [ˈaɾð̞wo]. Corpus data places it at rank #21,901 in overall Spanish word frequency, marking it as uncommon enough that many writers pause before typing it. Wiktionary records 2 distinct senses for this headword, so context determines which meaning a reader should apply.
Our generated misspelling index lists 6 likely wrong-spelling variants for arduo, with forms such as "adruo", "ardduo", and "ardou". Each of these forms differs from the correct spelling by one small edit: a doubled letter, a dropped silent letter, or a substituted vowel. It also participates in 20 confusable-pair relationships, "aro", "Armo", "arto", and more, a pairing that trips writers up because the two words share enough sound or shape to blur together.
Our source data has no etymology on file for this entry, leaving phoneme-to-grapheme mapping as the best guide to its spelling rather than a borrowing history. The correct Spanish form is arduo, spelled A-R-D-U-O.
Definition
- 1Muy complicado.
- 2Referido a un terreno; escabroso (de superficie desigual), intrincado, fragoso, difícil de recorrer.
Synonyms
This word in other languages
Common misspellings
Also misspelled as: adruo,ardduo,ardou,arrduo,arudo,raduo
Misspelling Pattern Breakdown
How far each generated variant is from the correct spelling of arduo - measured in single-character edits (insert, delete, or substitute a letter). Larger bars are easier to catch; one-edit slips are the sneakiest.
Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA); frequency ordering uses the FrequencyWords open word-frequency list (2018 Spanish corpus, MIT). See the methodology for how each field is sourced and updated.
Frequently Asked Questions
How do you spell "arduo"?
What does "arduo" mean?
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Is PlainSpell free to use?
Using “arduo”
The practical upshot for anyone who landed here from a spell-check.
- The one correct Spanish spelling is A-R-D-U-O - every other letter order is a misspelling in standard orthography.
- Say it as [ˈaɾð̞wo] (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
- Don't mix it up with “aro” - see the side-by-side comparison. arduo vs aro
- Browse more Spanish words and confusable pairs in the same reference. Spanish 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.