icivsillWhat's the difference?

Quick tell: ici is a adverb, ill is an adjective, so they fill different roles in a sentence.

Which to use

“ici” is an adverb and “ill” is an adjective - they look or sound alike but fill different roles in a sentence.

#45,880
“ici” frequency rank
#44,899
“ill” frequency rank
90779
confusion score

Side-by-Side Comparison

Feature ici ill
Definition aqui doente

Where the eye mixes ici and ill

Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.

3 ch
ici
3 ch
ill

Look-alike desk: ici vs ill

These two trip readers on the page rather than in the ear: ici is \i.si\ while ill is /ɪl/. Spoken aloud the problem disappears. In writing it persists, because they share most of their letters but differ in 2 positions, and the parts of speech differ too (adverb vs adjective), which is usually the fastest check. Our composite confusion score for this pair is 90779, derived from the frequency rank of both members and their visual similarity.

ici is recorded at frequency rank #45,880, classified as anadv, pronounced \i.si\. ill is at rank #44,899, tagged as anadj, pronounced /ɪl/.

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 90779, this pair ranks #247 of 75,631 scored Portuguese confusable pairs - among the most confusable pairs.

Orthographic DNA of ici vs ill

Shared letters: i. Private to "ici": c. Private to "ill": l.

"ici" · 3 letters · shape VCV  ·  "ill" · 3 letters · shape VCC

Frequently Asked Questions

Is swapping "ici" for "ill" ever safe?
No - they are not even the same part of speech. "ici" is an adverb and "ill" an adjective, so a sentence built for one is usually ungrammatical with the other.
Frequency check: "ici" vs "ill" - which ranks higher?
"ill" is the more common of the two: it sits at frequency rank #44,899 in our Portuguese list, against #45,880 for "ici". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

Eye-level mix-up between "ici" and "ill" is sorted above. Next: full entries or other pairs that share a letter shape.

  • Full dictionary entry for "ici" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "ill" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #247 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
  • "ici" and "ill" also get mixed up with nearby pairs, the highest-scored neighbour is "ici vs ino". Nearby pair

Confusion rank #247 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list