The term "be symptomatic" refers to a condition where a person exhibits signs or symptoms of a particular ailment. Some antonyms for this term include "asymptomatic," which refers to a person who shows no signs of an ailment even though they may have it. Another antonym is "healthy," which implies a person who is free from any disease or illness. Other antonyms include "well," "fit," "sound," "fine," and "robust." In essence, these terms imply a state of well-being, where an individual does not exhibit any signs of injury or sickness.