How to Say "inability" in Spanish
The most common Spanish word for “inability” is “incapacidad” — use 'incapacidad' when the inability stems from a lack of skill, talent, or inherent power to perform an action..
incapacidad
/een-kah-pah-see-dahd//inkapasiˈðad/

Examples
Su incapacidad para guardar secretos es un problema.
His inability to keep secrets is a problem.
Siento una gran incapacidad para entender este manual.
I feel a great inability to understand this manual.
La incapacidad de los testigos para recordar los hechos retrasó el juicio.
The witnesses' inability to remember the facts delayed the trial.
Using 'para' with Incapacidad
When you want to say 'inability TO do something,' use the word 'para' followed by the action (the base form of the verb).
Incapacidad vs. Discapacidad
Mistake: “Using 'incapacidad' for a physical handicap in all situations.”
Correction: While related, use 'discapacidad' for physical or mental disabilities, and 'incapacidad' more for the 'inability' to perform a specific task or a legal/medical leave.
imposibilidad
/eem-poh-see-bee-lee-DAHD//imposibiliˈdad/

Examples
La imposibilidad de viajar este año me pone muy triste.
The impossibility of traveling this year makes me very sad.
Existe una imposibilidad física para abrir esa puerta bloqueada.
There is a physical impossibility to open that blocked door.
Ante la imposibilidad de pagar la deuda, pidió ayuda al banco.
Given the inability to pay the debt, he asked the bank for help.
The '-dad' Rule
Most Spanish words that end in '-dad' are feminine. This means you should always use 'la' or 'una' with this word.
Connecting to Actions
To say what is impossible, use the connector word 'de' followed by a verb in its basic form (the 'ar/er/ir' form). For example: 'la imposibilidad de comer'.
Using the Wrong Gender
Mistake: “el imposibilidad”
Correction: la imposibilidad
Confusing it with the Adjective
Mistake: “es un imposibilidad”
Correction: es imposible
Skill vs. Circumstance
Related Translations
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