Adjectives are words that usually describe the subject of the sentence (they can also complement adverbs or other adjectives). In Spanish, there are some prefixes that can change a positive adjective to a negative one. This is an excellent, simple way to learn new vocabulary.

Spanish

English

El camino hasta la montaña es impredecible.

The road up the mountain is unpredictable.

Some adjectives of positive degrees can be turned into those of negative degree by adding a prefix. Prefixes are grammatical elements that are placed before a word and modify its meaning or part of speech.

The following guidelines were created based on the frequency with which they occur. However, keep in mind that they are not grammatical rules per se, so you will find a lot of exceptions as well.

Adjectives Beginning with Vowels and Consonants

The first group is more general, including words that begin with either a vowel or a consonant, and can take any of the following prefixes for their negative form.

Rule 1. It is very common for both adjectives beginning with a vowel or consonant to take the prefix des- to become negative.

Here are some examples:

  • Words that begin with a vowel:
Positive AdjectiveNegative FormTranslation
afortunado desafortunado unfortunate
abrochado desabrochado unbuttoned
enamorado desenamorado out of love
Positive AdjectiveNegative FormTranslation
afortunado desafortunado unfortunate
abrochado desabrochado unbuttoned
enamorado desenamorado out of love

Spanish

English

¿No tienes frío? Tu chamarra está desabrochada.

Aren't you cold? Your jacket is unbuttoned.

  • Words that begin with a consonant:
Positive AdjectiveNegative FormTranslation
conocido desconocido unknown
cansado descansado rested
Positive AdjectiveNegative FormTranslation
conocido desconocido unknown
cansado descansado rested

Spanish

English

La causa del alboroto es desconocida.

The cause of the disturbance is unknown.

Rule 2. It is also common but less frequent to see the prefix in- in negative forms.

Positive AdjectiveNegative FormTranslation
correcto incorrecto incorrect
apropiado inapropiado inappropriate
evitable inevitable unavoidable
Positive AdjectiveNegative FormTranslation
correcto incorrecto incorrect
apropiado inapropiado inappropriate
evitable inevitable unavoidable

Spanish

English

Era inevitable que esto pasara.

It was inevitable that this would happen.

The second group is a little more specific, since the negative prefix used tends to depend on the first letter of the adjective.

Adjectives Beginning with V

Rule 3. Many adjectives beginning with the letter v are prefixed with in- to make them negative.

Here are some examples:

Positive AdjectiveNegative FormTranslation
visible invisible invisible
válido inválido invalid
Positive AdjectiveNegative FormTranslation
visible invisible invisible
válido inválido invalid

Spanish

English

Los rayos ultravioleta (UV) son invisibles.

Ultraviolet (UV) rays are invisible.

Adjectives beginning with L

Rule 4. Some adjectives beginning with the letter l are prefixed with i- to make them negative.

Here are some examples:

Positive AdjectiveNegative FormTranslation
legal ilegal illegal
lógico ilógico illogical
legible ilegible illegible
Positive AdjectiveNegative FormTranslation
legal ilegal illegal
lógico ilógico illogical
legible ilegible illegible

Spanish

English

Tu razonamiento es completamente ilógico.

Your reasoning is completely illogical.

Adjectives Beginning with R

Rule 5. Some adjectives beginning with the letter r are prefixed with ir- to make them negative.

Here are some examples:

Positive AdjectiveNegative FormTranslation
responsable irresponsable irresponsible
real irreal unreal
razonable irrazonable unreasonable
Positive AdjectiveNegative FormTranslation
responsable irresponsable irresponsible
real irreal unreal
razonable irrazonable unreasonable

Spanish

English

Fue una actitud muy irresponsable.

It was a very irresponsible attitude.

Quiz

1/3

Me encantaría tener el superpoder de ser __visible.

0

correct answers.