1, 2. adamant, unrelenting, unsympathetic, cruel, unfeeling. Stern, severe, harsh agree in referring to methods, aspects, manners, or facial expressions. Stern implies uncompromising, inflexible firmness, and sometimes a hard, forbidding, or withdrawn aspect or nature: a stern parent. Severe implies strictness, lack of sympathy, and a tendency to impose a hard discipline on others: a severe judge. Harsh suggests a great severity and roughness, and cruel, unfeeling treatment of others: a harsh critic.