unacceptable
Hay una fina línea entre lo aceptable y lo inaceptable.
There is a fine line between acceptable and unacceptable.
Es muy lamentable que su solicitud haya sido considerada inaceptable.
It is very unfortunate that your request was deemed unacceptable.
Ella me pidió una inaceptable suma de dinero.
She asked me for an unacceptable sum of money.
His reaction is unacceptable.
¡No! Eso es completamente inaceptable.
No! That is completely unacceptable.
This is unacceptable.