"Aponia" means the absence of pain, and was regarded by the Epicureans to be the height of bodily pleasure.
As with the other Hellenistic schools of philosophy, the Epicureans believed that the goal of human life is happiness. The Epicureans defined pleasure as the absence of pain (mental and physical), and hence pleasure can only increase until the point in which pain is absent. Beyond this, pleasure cannot increase further, and indeed one cannot rationally seek bodily pleasure beyond the state of aponia. For Epicurus, aponia was one of the static (katastematic) pleasures, that is, a pleasure one has when there is no want or pain to be removed. To achieve such a state, one has to experience kinetic pleasures, that is, a pleasure one has when want or pain is being removed.
The gens Aponia was a Roman family during the later Republic, and the 1st century of the Empire. The gens is known from only a few individuals.
n. The absence of pain considered as a state of spiritual serenity