I'mvsisiConfusable pair

Quick tell: I'm is a contraction, isi is a noun, so they fill different roles in a sentence.

Which to use

“I'm” is a contraction and “isi” is a noun - they look or sound alike but fill different roles in a sentence.

#8,530
“I'm” frequency rank
#39,822
“isi” frequency rank
48352
confusion score

Side-by-Side Comparison

Feature I'm isi
Definition Contracción de I y am, "yo soy" o "yo estoy". El extranjero, tierra o país de donde uno no es.

Where the eye mixes I'm and isi

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

3 ch
I'm
3 ch
isi

Visual trap between I'm and isi

These two trip readers on the page rather than in the ear: I'm is /aɪm/ while isi is /ì.sí/. 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 (contraction vs noun), which is usually the fastest check. Our composite confusion score for this pair is 48352, derived from the frequency rank of both members and their visual similarity.

I'm is recorded at frequency rank #8,530, classified as acontraction, pronounced /aɪm/. isi is at rank #39,822, tagged as anoun, pronounced /ì.sí/.

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 48352, this pair ranks #114,979 of 323,831 scored Spanish confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of I'm vs isi

Shared letters: i. Private to "I'm": m. Private to "isi": s.

"I'm" · 2 letters · shape VC  ·  "isi" · 3 letters · shape VCV

Frequently Asked Questions

Do "I'm" and "isi" mean the same thing in a sentence?
No - they are not even the same part of speech. "I'm" is a contraction and "isi" a noun, so a sentence built for one is usually ungrammatical with the other.
In ordinary Spanish text, does "I'm" or "isi" show up more?
"I'm" is the more common of the two: it sits at frequency rank #8,530 in our Spanish list, against #39,822 for "isi". 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 "I'm" and "isi" is sorted above. Next: full entries or other pairs that share a letter shape.

  • Full dictionary entry for "I'm" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "isi" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #114,979 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "I'm" and "isi" also get mixed up with nearby pairs, the highest-scored neighbour is "isi vs iza". Nearby pair

Confusion rank #114,979 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