Not conceivable; incapable of being conceived by the mind; not explicable by the human intellect, or by any known principles or agencies; incomprehensible; as, it is inconceivable to us how the will acts in producing muscular motion.
inconceivable in Dutch is ondoorgrondelijk, onbegrijpelijk
inconceivable in Italian is incomprensibile
inconceivable in Norwegian is ufattelig
inconceivable in Spanish is inconcebible
inconceivable in Swedish is ofattlig