Translation of "Scathing" in Spanish

His corps commanders, especially Marshal Ney, were scathing of his conduct.

Los comandantes de su cuerpo, especialmente el mariscal Ney, fueron mordaces con su conducta.

Napoleon had expected Berthier to rejoin him in  1815, and was scathing of his absence, “I have  

Napoleón había esperado que Berthier se reuniera con él en 1815, y fue mordaz por su ausencia: "Me