Italian adjectives ending in -bile and their negation

An interactive lesson guiding you from key takeaways to expert insights. Comes with Q&A, useful vocabulary, interactive audio, quizzes and games.

Il libro è comprensibile.
Il libro è comprensibile.
Il libro è comprensibile.
Published Nov 3, 2020
Updated May 19, 2026
Written by
Italian language tutor, course author. MEng, MBA. Member of the International Association of Hyperpolyglots (HYPIA). After learning 12 languages, I can tell you that we all master languages by listening and mimicking. I couldn’t find an app to recommend to my students, so I made my own one. With my method, you’ll be speaking Italian from Lesson 1.
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Key Takeaways

  • Italian adjectives ending in -bile indicate possibility or ability to possess a certain characteristic.
  • Common examples include accessibile (accessible), credibile (credible), and possibile (possible).
  • Negation of these adjectives is typically formed by adding in-, im-, or ir- at the beginning.
  • Use in- for most adjectives, while im- is used for those starting with p or m.
  • For adjectives starting with r, use ir- for negation, such as irresponsabile (irresponsible).

Stefano's Insights

Play to see captions...
Ah, gli aggettivi in -bile! Questi piccoli gioielli linguistici ci permettono di esprimere possibilità e abilità. Derivano dal latino e sono un gioco da ragazzi da imparare per chi parla inglese, visto che spesso finiscono in -ble. Parole come 'accessibile', 'accettabile' e 'credibile' si spiegano da sole. E poi c'è il trucco del prefisso: 'in-', 'im-', 'ir-' per creare l'opposto. È come trasformare magicamente 'possibile' in 'impossibile'. Ricordo quando ho imparato 'incredibile' e mi sono sentito un mago delle parole! Ma attenzione alle eccezioni: 'im-' per aggettivi che iniziano con 'p' o 'm', e 'ir-' per quelli con 'r'. Un po' come un puzzle linguistico, no? Buona fortuna con il resto degli aggettivi!
Ah, adjectives ending in -bile! These linguistic gems let us express possibility and ability. They come from Latin and are easy for English speakers to learn since they often end in -ble. Words like 'accessibile', 'accettabile', and 'credibile' are self-explanatory. Then there's the prefix trick: 'in-', 'im-', 'ir-' to create opposites. It's like magically turning 'possibile' into 'impossibile'. I remember learning 'incredibile' and feeling like a word wizard! But watch out for exceptions: 'im-' for adjectives starting with 'p' or 'm', and 'ir-' for those with 'r'. It's like a linguistic puzzle, right? Good luck with the rest of the adjectives!

Quick facts

What linguistic origin do Italian adjectives ending in -bile have?

They derive from Latin, indicating the possibility or ability to possess a specific characteristic.

How do these Italian adjectives correlate with English adjectives?

Their English equivalents usually end in -ble, making them easy to recognize and learn.

Why are adjectives like "accessibile" and "compatibile" easily recognizable in English?

Because they translate to "accessible" and "compatible," sharing similar meanings and endings.

What does the Italian adjective "sensibile" translate to in English?

It translates to "sensitive," while "sensible" would be "sensato" in Italian.

What suffix is used to indicate the opposite of adjectives in Italian?

The prefixes in-, im-, and ir- are used to indicate the opposite.

When is the prefix im- typically used in Italian adjectives?

Im- is commonly added to adjectives starting with "p" or "m."

Which prefix is used for adjectives beginning with "r"?

The prefix ir- is used, although it's less common than in- or im-.

Can you provide an example of an adjective with the prefix in-?

"Inaccessibile" is an example, meaning "inaccessible."

Are there any exceptions to how the prefixes in-, im-, and ir- are used?

Yes, im- is specifically used for adjectives starting with "p" or "m," while ir- is for those starting with "r."

How does the adjective "incompatibile" compare to its English counterpart?

It directly translates to "incompatible," following the same prefix and meaning structure as in English.

Audio images

🔊
La lezione è comprensibile.
🔊
L'idea è comprensibile.
🔊
Il libro è comprensibile.

Audio lesson with 30 sentences to listen and repeat

Italian grammar video lesson

Main Article

What are the adjectives ending in -bile?

In Italian, there are groups of adjectives that have the same ending. In this case, we’re going to focus on those ending in -bile (either –able or –ible).

This specific ending comes from Latin and refers to the possibility or the ability to have a specific characteristic.

Their equivalents in English usually end in -ble (also either -able or -ible) so they are easy to recognize and learn. Here’s a list of common adjectives ending in -bile:

  • accessibile: accessible
  • accettabile: acceptable
  • compatibile: compatible
  • comprensibile: comprehensible
  • concepibile: conceivable
  • credibile: credible
  • desiderabile: desirable
  • paragonabile: comparable
  • possibile: possible
  • responsabile: responsible
  • sensibile: sensitive (if you want to say sensible, then you can say sensato)
  • vulnerabile: vulnerable

What are the adjectives starting with in-, im-, ir- and ending in -bile?

Like in English, in Italian we can say the opposite of an adjective just by adding two letters at the beginning of it: either in-im-, or -ir. Think of the words possible vs. impossible, or credible vs. incredible.

It’s the same logic in Italian. We tend to use in- much more often than im-.

However, there are some exceptions: im- is usually added to those adjectives starting with a “p” or an “m“.

There is a much less common one which is ir- for those words starting with an “r“. We’ll give you the opposite of the first five adjectives that we saw above.

We’ll leave the rest to you. Make sure you apply the rules we just gave you.

  • inaccessibile: inaccessible
  • inaccettabile: inacceptable
  • incompatibile: incompatible
  • incomprensibile: incomprehensible
  • inconcepibile: inconceivable

Key Terms and Concepts

Adjectives ending in -bile

Italian adjectives ending in -bile signify the ability or possibility of having a certain characteristic, equivalent to English -ble adjectives.

Negation prefixes: in-, im-, ir-

These prefixes are added to adjectives to form their opposites, similar to English 'in-', 'im-', and 'ir-', with usage rules based on initial letters.

Prefix in-

The most common negation prefix, primarily used for adjectives not beginning with p, m, or r, such as inaccessibile.

Prefix im-

Used for negation before adjectives starting with p or m, like impossibile, aligning with phonetic considerations.

Prefix ir-

A less common prefix for adjectives starting with r, forming words like irresponsabile.

Test your knowledge in 10 quick questions

Words

accessibileaccessible
inaccessibileinaccessible
accettabileacceptable
inaccettabileunacceptable
compatibilecompatible
incompatibileincompatible
comprensibileunderstandable
incomprensibileincomprehensible
ammissibileadmissible
inammissibileinadmissible

Phrases

accessibileaccessible
inaccessibileinaccessible
accettabileacceptable
inaccettabileunacceptable
compatibilecompatible
incompatibileincompatible
comprensibileunderstandable
incomprensibileincomprehensible
visibilevisible
invisibileinvisible

Sentences

L'ingresso della torre è completamente accessibile ai visitatori.

The tower entrance is completely accessible to visitors.

Questa proposta è accettabile, ma dobbiamo discutere alcuni dettagli.

This proposal is acceptable, but we need to discuss some details.

La vecchia tecnologia è spesso incompatibile con i nuovi dispositivi.

Old technology is often incompatible with new devices.

L'accesso al giardino è inaccessibile durante i lavori di ristrutturazione.

Access to the garden is inaccessible during renovation work.

Il comportamento dell'impiegato era inaccettabile e ha richiesto un'azione disciplinare.

The employee's behavior was unacceptable and required disciplinary action.

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FAQs

How do adjectives work in Italian?

The Italian language follows a grammatical rule wherein an adjective must match the gender and number of the noun it describes. This means that if the noun is feminine and singular, the adjective should also be feminine and singular. Similarly, if the noun is masculine and plural, the adjective should be masculine and plural as well.

Where are adjectives placed in Italian?

Italian grammar dictates that adjectives are usually placed after the noun they describe. When using two adjectives, they are linked by the conjunction "e" (meaning "and"), either before or after the noun. It is important to bear in mind that the adverb "molto" (meaning "very") always follows the noun when used with an adjective.

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