Which to use
“arduo” and “asiduo” are a confusable Spanish pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #21,901
- “arduo” frequency rank
- #37,433
- “asiduo” frequency rank
- 59334
- confusion score
Side-by-Side Comparison
| Feature | arduo | asiduo |
|---|---|---|
| Definition | Muy complicado. | Que se hace frecuente, con diligencia o de manera constante |
Where the eye mixes arduo and asiduo
Muted = shared; highlighted = the visual trap. They share 4 letters in sequence. arduo runs 5 letters (VCCVV) against asiduo's 6 (VCVCVV) - the length gap alone is often enough to separate them once you know to check it.
Visual trap between arduo and asiduo
A purely visual mix-up. arduo ([ˈaɾð̞wo]) and asiduo ([aˈsið̞wo]) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they differ by 1 letter(s) in length. Our composite confusion score for this pair is 59334, derived from the frequency rank of both members and their visual similarity.
arduo is recorded at frequency rank #21,901, classified as anadj, pronounced [ˈaɾð̞wo]. asiduo is at rank #37,433, tagged as anadj, pronounced [aˈsið̞wo].
Glosses for this pair are partially populated in our dataset, but the full side-by-side definitions above should still guide you to the right choice.
With a confusion score of 59334, this pair ranks #63,000 of 323,831 scored Spanish confusable pairs - among the most confusable pairs.
Orthographic DNA of arduo vs asiduo
Shared letters: adou. Private to "arduo": r. Private to "asiduo": is.
"arduo" · 5 letters · shape VCCVV · "asiduo" · 6 letters · shape VCVCVV
Known mistypes of this pair
Frequently Asked Questions
Do "arduo" and "asiduo" mean the same thing in a sentence?
Which is more common, "arduo" or "asiduo"?
What to do next
Eye-level mix-up between "arduo" and "asiduo" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "arduo" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "asiduo" - compare definitions side by side with the headword page. Word entry
- This pair ranks #63,000 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
- "arduo" and "asiduo" also get mixed up with nearby pairs, the highest-scored neighbour is "asiduo vs asiduos". Nearby pair
- Recorded mistypes exist for at least one side of this pair, useful when a spell-checker or OCR lands on the wrong form. See mistypes
Confusion rank #63,000 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.