iam vs io, What's the Difference?

Which to use

“iam” is a verb and “io” is an adverb - they look or sound alike but fill different roles in a sentence.

#4,823
“iam” frequency rank: #18,900
“io” frequency rank: 23723
confusion score

Side-by-Side Comparison

Feature	iam	io
Definition	terceira pessoa do plural do pretérito imperfeito do indicativo do verbo ir	sempre

Where the eye mixes iam and io

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

3 ch

iam

2 ch

Why the eye confuses iam with io

These two trip readers on the page rather than in the ear: iam is /ˈi.am/, /ˈi.ɑm/ while io is /ˈi.o/, /ˈi.ɔ/. Spoken aloud the problem disappears. In writing it persists, because they differ by 1 letter(s) in length, and the parts of speech differ too (verb vs adverb), which is usually the fastest check. Our composite confusion score for this pair is 23723, derived from the frequency rank of both members and their visual similarity.

iam is recorded at frequency rank #4,823, classified as averb, pronounced /ˈi.am/, /ˈi.ɑm/. io is at rank #18,900, tagged as anadv, pronounced /ˈi.o/, /ˈi.ɔ/.

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 23723, this pair ranks #46,051 of 75,631 scored Portuguese confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of iam vs io

Shared letters: i. Private to "iam": am. Private to "io": o.

"iam" · 3 letters · shape VVC · "io" · 2 letters · shape VV

Frequently Asked Questions

Is swapping "iam" for "io" ever safe?

No - they are not even the same part of speech. "iam" is a verb and "io" an adverb, so a sentence built for one is usually ungrammatical with the other.

In ordinary Portuguese text, does "iam" or "io" show up more?

"iam" is the more common of the two: it sits at frequency rank #4,823 in our Portuguese list, against #18,900 for "io". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

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

Full dictionary entry for "iam" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "io" - compare definitions side by side with the headword page. Word entry
This pair ranks #46,051 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
"iam" and "io" also get mixed up with nearby pairs, the highest-scored neighbour is "ino vs io". Nearby pair

Confusion rank #46,051 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.