caustic
adjective
1. harsh or corrosive in tone
- caustic jokes about political assassination, talk-show hosts and medical ethics
Similar word(s): unpleasant, acerb, acerbic, acid, acrid, bitter, blistering, sulfurous, sulphurous, virulent, vitriolic
2. of a substance, especially a strong acid; capable of destroying or eating away by chemical action
Similar word(s): destructive, corrosive, erosive, mordant, vitriolic