sein vs seiva, What's the Difference?

Which to use

“sein” is a verb and “seiva” is a noun - they look or sound alike but fill different roles in a sentence.

#43,647
“sein” frequency rank: #33,612
“seiva” frequency rank: 77259
confusion score

Side-by-Side Comparison

Feature	sein	seiva
Definition	ser, estar.	líquido nutritivo que circula nas plantas

Where the spellings diverge

Shared letters are muted; the letters that actually set sein and seiva apart are highlighted. They share 3 letters in sequence, which is exactly why the eye skips the difference.

4 ch

sein

5 ch

seiva

Spelling & Dictionary Insight

These two trip readers on the page rather than in the ear: sein is /zaɪ̯n/ while seiva is /ˈsɐj.vɐ/. 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 noun), which is usually the fastest check. Our composite confusion score for this pair is 77259, derived from the frequency rank of both members and their visual similarity.

sein is recorded at frequency rank #43,647, classified as averb, pronounced /zaɪ̯n/. seiva is at rank #33,612, tagged as anoun, pronounced /ˈsɐj.vɐ/.

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 77259, this pair ranks #1,929 of 75,631 scored Portuguese confusable pairs - among the most confusable pairs.

Orthographic DNA of sein vs seiva

Shared letters: eis. Private to "sein": n. Private to "seiva": av.

"sein" · 4 letters · shape CVVC · "seiva" · 5 letters · shape CVVCV

Known mistypes of this pair

sein ← esin · seinn · seni · sien · ssein
seiva ← esiva · seiav · seivva · sevia · sieva · sseiva

Frequency comparison

sein#43,647

seiva#33,612

Source: FrequencyWords open word-frequency list

Frequently Asked Questions

Can "sein" and "seiva" be used interchangeably?

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

Which is more common, "sein" or "seiva"?

"seiva" is the more common of the two: it sits at frequency rank #33,612 in our Portuguese list, against #43,647 for "sein". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Remembering sein vs seiva

The fastest way to pick the right one every time.

Check the role first: if you need a verb, it's “sein”; for a noun, it's “seiva”.
See each word in full, definition, IPA, etymology and its other confusables. Full “sein” entry
Browse more pairs most likely to be confused. Most confusable