How to Say "unaccountable" in Spanish
The Spanish word for “unaccountable” is “inexplicable” — B1 level.

Examples
Fue un error inexplicable.
It was an inexplicable error.
Siento una alegría inexplicable hoy.
I feel an unexplainable joy today.
La desaparición de las llaves es inexplicable.
The disappearance of the keys is inexplicable.
One Form for All
This word ends in -e, which means it stays the same whether you are talking about a masculine or feminine thing. You can say 'un misterio inexplicable' or 'una razón inexplicable'.
Adding 'In-' for 'Not'
In Spanish, adding 'in-' to the beginning of a word often works just like the English 'un-' or 'in-', meaning 'not.' So, 'inexplicable' is simply 'not explicable'.
Avoid 'Inexplicablo'
Mistake: “El problema es inexplicablo.”
Correction: El problema es inexplicable.
Related Translations
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