bak vs by, What's the Difference?

Which to use

“bak” is a noun and “by” is a preposition - they look or sound alike but fill different roles in a sentence.

#38,589
“bak” frequency rank: #1,598
“by” frequency rank: 40187
confusion score

Side-by-Side Comparison

Feature	bak	by
Definition	retaguarda, parte traseira	por;

Letter map: bak vs by

Shared letters muted; letters that set bak and by apart highlighted. Shared run: 1.

3 ch

bak

2 ch

Role in the sentence - bak and by

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: bak is anoun and byapreposition. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 40187, derived from the frequency rank of both members and their visual similarity.

bak is recorded at frequency rank #38,589, classified as anoun, pronounced /ˈbaːk/. by is at rank #1,598, tagged as aprep.

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 40187, this pair ranks #25,968 of 75,631 scored Portuguese confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of bak vs by

Shared letters: b. Private to "bak": ak. Private to "by": y.

"bak" · 3 letters · shape CVC · "by" · 2 letters · shape CV

Frequently Asked Questions

Is swapping "bak" for "by" ever safe?

No - they are not even the same part of speech. "bak" is a noun and "by" a preposition, so a sentence built for one is usually ungrammatical with the other.

In ordinary Portuguese text, does "bak" or "by" show up more?

"by" is the more common of the two: it sits at frequency rank #1,598 in our Portuguese list, against #38,589 for "bak". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

What to do next

Done with this confusable. These links stay specific to "bak" and "by".

Full dictionary entry for "bak" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "by" - compare definitions side by side with the headword page. Word entry
This pair ranks #25,968 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
"bak" and "by" also get mixed up with nearby pairs, the highest-scored neighbour is "bak vs bué". Nearby pair

Confusion rank #25,968 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.