ichvsillWhat's the difference?

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

Which to use

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

#41,406
“ich” frequency rank
#43,059
“ill” frequency rank
84465
confusion score

Side-by-Side Comparison

Feature ich ill
Definition Yo (pronombre de primera persona singular) Enfermo.

Where the eye mixes ich and ill

Muted = shared; highlighted = the visual trap. They share 1 letter in sequence. ich and ill follow the identical consonant-vowel pattern (VCC). Same shape at a glance is often the real trap, independent of shared letters.

3 ch
ich
3 ch
ill

Look-alike desk: ich vs ill

These two trip readers on the page rather than in the ear: ich is [ɪç] 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 (pronoun vs adjective), which is usually the fastest check. Our composite confusion score for this pair is 84465, derived from the frequency rank of both members and their visual similarity.

ich is recorded at frequency rank #41,406, classified as apron, pronounced [ɪç]. ill is at rank #43,059, 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 84465, this pair ranks #7,032 of 323,831 scored Spanish confusable pairs - among the most confusable pairs.

Orthographic DNA of ich vs ill

Shared letters: i. Private to "ich": ch. Private to "ill": l.

"ich" · 3 letters · shape VCC  ·  "ill" · 3 letters · shape VCC

Frequently Asked Questions

Can "ich" and "ill" be used interchangeably?
No - they are not even the same part of speech. "ich" is a pronoun and "ill" an adjective, so a sentence built for one is usually ungrammatical with the other.
In ordinary Spanish text, does "ich" or "ill" show up more?
"ich" is the more common of the two: it sits at frequency rank #41,406 in our Spanish list, against #43,059 for "ill". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

What to do next

Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.

  • Full dictionary entry for "ich" 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 #7,032 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "ich" and "ill" also get mixed up with nearby pairs, the highest-scored neighbour is "ill vs iza". Nearby pair

Confusion rank #7,032 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.

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

Source: FrequencyWords open word-frequency list