Jitteriness refers to a sensation of unease or nervousness. It can be described in many antonyms such as calmness, tranquility, serenity or poise. Whereas jitteriness is characterized by trembling, shaking or restlessness, its antonyms evoke a sense of stillness, relaxation or composure. When one is jittery, they may feel a sense of uncertainty or lack of control. However, an antonym like confidence suggests a reassurance and the belief in one's abilities. Similarly, anxiousness represents apprehension or worry, while composure expresses a poised and controlled state. Overall, the antonyms for jitteriness portray a sense of inner peace, steadiness, and the absence of stress or tension.