caustic(capable of destroying organic tissue) adjective [UK: ˈkɔː.stɪk] [US: ˈkɑː.stɪk]Though common in cleaning products, ammonia is caustic. = Anche se comune nei prodotti per la pulizia, l'ammoniaca è caustica.
mordant(biting or caustic) adjective [UK: ˈmɔːdnt] [US: ˈmɔːr.dənt]
pungent(having a sharp and stiff point) adjective [UK: ˈpʌn.dʒənt] [US: ˈpʌn.dʒənt]
scathing(harshly or bitterly critical) adjective [UK: ˈskeɪ.ðɪŋ] [US: ˈskeɪ.ðɪŋ]