ero

adj

The verdict

“ero” is uncommon French (frequency #94,779 among 201,161 “E” headwords), classed as an adjective. The kind of spelling people second-guess.

#94,779
frequency rank, French
201,161
“E” headwords

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Fou, insensé, cinglé, dingue.

Key facts for ero
PropertyValue
Headwordero
LanguageFrench
Part of speechAdjective
Letters3
Frequency rank#94,779
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Where “ero” sits in French frequency

Every-word frequency runs from the handful of words we use constantly (left) to the long tail used once in a blue moon (right). ero lands here:

#1#100#1K#10K#100K
← used constantlyrarely used →

Scale is logarithmic (each tick is 10× rarer). Source: FrequencyWords open word-frequency list.

Rare enough to double-check

ero is uncommon French at frequency #94,779 among 201,161 “E” headwords, classed as anadjective. Rarity is why readers land here mid-draft. 2 senses are on record.

We couldn't generate a plausible misspelling set for ero, which points to an orthography that plays by predictable French rules. We don't track a confusable pairing for this entry, which typically means the spelling is too distinctive to be mistaken for another word.

No explicit etymology string is stored for this entry, so its spelling is best explained by sound-to-letter mapping rather than etymology. The correct French form is ero, spelled E-R-O.

Definition

  1. 1
    Fou, insensé, cinglé, dingue.
  2. 2
    Irrationnel, inconscient.

Synonyms

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA); frequency ordering uses the FrequencyWords open word-frequency list (2018 French corpus, MIT). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "ero"?
"ero" is spelled E-R-O.
What does "ero" mean?
As an adjective, "ero" means: Fou, insensé, cinglé, dingue.
What language does "ero" come from?
"ero" is a French word. PlainSpell's reference spans five languages -- English, Spanish, Portuguese, French, and German -- with definitions, pronunciations, and spelling data for each.
Is PlainSpell free to use?
Yes, PlainSpell is a completely free word reference. You can look up definitions, pronunciations, confusable pairs, homophones, and spelling corrections across 5 languages without any sign-up or subscription.

Using “ero”

The practical upshot for anyone who landed here from a spell-check.

  • The one correct French spelling is E-R-O - every other letter order is a misspelling in standard orthography.
  • Browse more French words and confusable pairs in the same reference. French words

Other uncommon French words near this rank

Data Source

Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Word ordering uses an open word-frequency list; misspelling variants are generated by edit-distance from the correct headword.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list FrequencyWords open word-frequency list