UNMALLEABLE • DICCIONARIO INGLES.COM • Definition of Unmalleable

... Memnon and the Nile, but a mere modern landscape, so to speak, shut in by less than two centuries. And yet what unspeakable things are included in that brief period! If we have made such vast strides and so rapid a development in those few years of our national life, with the heterogeneous and unmalleable materials with which we had to deal, converting the filth of Europe into grass and flowers for the decoration of the republic, what may we not achieve hereafter, when this dreadful war is over, and the negro question is adjusted, and the sundered States are reunited, ...

— The Continental Monthly, Vol. 6, No 4, October, 1864 - Devoted To Literature And National Policy • Various