caustic/ˈkɔ:stɪk; `kɔstɪk/ adj1 that can burn or destroy things by chemical action 腐蚀性的; 苛性的.2 (fig 比喻) (of comments) sarcastic; cutting （指评论）讽刺的; 挖苦的: caustic remarks 刻薄话 a caustic wit 言词尖刻的人.
牛津英汉双解词典