a-

prefix

The verdict

“a-” is uncommon Spanish (outside the top frequency list), classed as a prefix. The kind of spelling people second-guess.

Unranked
below top-frequency Spanish
2
letters

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Forma verbos a partir de sustantivos o adjetivos, con el significado de "hacer" o "formar, entrar en estado de" lo indicado por la base.

Corpus desk

Index ES-a · a- · Spanish

a- · unranked · 0 variants · 0 confusables

  • FREQ-UNRANKED Unranked
  • LEN-SHORT 2 letters
  • VOW-1 1 vowel
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-THIN "A" thin
  • PHOTO-UNK Peer pending

Desk codes from Wiktionary headword shape, FrequencyWords rank tier, confusable-pair count, generated misspelling depth, letter-cohort book size, and photo-finish peer. Not a difficulty grade.

Key facts for a-
PropertyValue
Headworda-
LanguageSpanish
Part of speechPrefix
Letters2
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Dónde se sitúa “a-” en la frecuencia del español

a-no entra en el top 100.000 del español: zona de términos técnicos, arcaicos o escasos, el terreno típico de la doble comprobación.

Beyond rank #100,000. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

a- is uncommon Spanish outside the top frequency list, classed as aprefix. Rarity is why readers land here mid-draft. Gloss: "Forma verbos a partir de sustantivos o adjetivos, con el significado de "hacer" o "formar, entrar en estado de" lo indicado por la base.".

Our edit-distance generator produced no likely misspellings for a-, suggesting the orthography follows predictable Spanish patterns. It is not paired with a close-neighbour confusable in our dataset, since no other headword is close enough in sound or shape to pair with it.

This entry carries no recorded etymology, so its spelling is easiest explained by how it's pronounced rather than where it came from. The correct Spanish form is a-, spelled A--.

Definition

  1. 1
    Forma verbos a partir de sustantivos o adjetivos, con el significado de "hacer" o "formar, entrar en estado de" lo indicado por la base.

Recorded use

Wiktionary example

These source excerpts show how a- appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.

  1. aclarar ("hacer claro") • agrupar ("formar grupo") • acabar.

This word in other languages

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "a-"?
"a-" is spelled A--.
What does "a-" mean?
As a prefix, "a-" means: Forma verbos a partir de sustantivos o adjetivos, con el significado de "hacer" o "formar, entrar en estado de" lo indicado por la base.
What language does "a-" come from?
"a-" is a Spanish 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.

What to do next

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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