sae vs sei, What's the Difference?

Which to use

“sae” is a verb and “sei” is a num - they look or sound alike but fill different roles in a sentence.

#32,867
“sae” frequency rank: #48,072
“sei” frequency rank: 80939
confusion score

Side-by-Side Comparison

Feature	sae	sei
Definition	Tercera persona del singular (el, ela, vostede) del presente de indicativo de saír.	Seis.

Where the spellings diverge

Shared letters are muted; the letters that actually set sae and sei apart are highlighted. They share 2 letters in sequence, which is exactly why the eye skips the difference.

3 ch

sae

3 ch

sei

Spelling & Dictionary Insight

These two trip readers on the page rather than in the ear: sae is [ˈsaɪ] while sei is /s̺ej/. 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 (verb vs num), which is usually the fastest check. Our composite confusion score for this pair is 80939, derived from the frequency rank of both members and their visual similarity.

sae is recorded at frequency rank #32,867, classified as averb, pronounced [ˈsaɪ]. sei is at rank #48,072, tagged as anum, pronounced /s̺ej/.

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 80939, this pair ranks #11,031 of 323,831 scored Spanish confusable pairs - among the most confusable pairs.

Orthographic DNA of sae vs sei

Shared letters: es. Private to "sae": a. Private to "sei": i.

"sae" · 3 letters · shape CVV · "sei" · 3 letters · shape CVV

Frequency comparison

sae#32,867

sei#48,072

Source: FrequencyWords open word-frequency list

Frequently Asked Questions

Can "sae" and "sei" be used interchangeably?

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

Which is more common, "sae" or "sei"?

"sae" is the more common of the two: it sits at frequency rank #32,867 in our Spanish list, against #48,072 for "sei". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Remembering sae vs sei

The fastest way to pick the right one every time.

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