Which to use
“ei” is a verb and “em” is a preposition - they look or sound alike but fill different roles in a sentence.
- #9,105
- “ei” frequency rank
- #7,152
- “em” frequency rank
- 16257
- confusion score
Side-by-Side Comparison
| Feature | ei | em |
|---|---|---|
| Definition | La tercera persona singular del verbo de negación, usado en el indicativo, en el condicional y en el potencial; "no". | En. |
Where the eye mixes ei and em
Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.
Visual trap between ei and em
These two trip readers on the page rather than in the ear: ei is [ˈe̞i̯] while em is [ĩ]. Spoken aloud the problem disappears. In writing it persists, because they differ by a single letter - i in “ei” becomes m in “em”, and the parts of speech differ too (verb vs preposition), which is usually the fastest check. Our composite confusion score for this pair is 16257, derived from the frequency rank of both members and their visual similarity.
ei is recorded at frequency rank #9,105, classified as averb, pronounced [ˈe̞i̯]. em is at rank #7,152, tagged as aprep, pronounced [ĩ].
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 16257, this pair ranks #276,916 of 323,831 scored Spanish confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of ei vs em
Shared letters: e. Private to "ei": i. Private to "em": m.
"ei" · 2 letters · shape VV · "em" · 2 letters · shape VC
Frequently Asked Questions
Do "ei" and "em" mean the same thing in a sentence?
In ordinary Spanish text, does "ei" or "em" show up more?
After this comparison
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "ei" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "em" - compare definitions side by side with the headword page. Word entry
- This pair ranks #276,916 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
- "ei" and "em" also get mixed up with nearby pairs, the highest-scored neighbour is "ei vs EPL". Nearby pair
Confusion rank #276,916 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.