Wisdom in determining ends and the means of attaining them.
Phronesis, “wisdom in determining ends and the means of attaining them, practical understanding, sound judgment,” comes from Latin phronēsis, from Greek phrónēsis, meaning “practical wisdom, prudence in government and public affairs” in Plato, Aristotle, and other heavy hitters. Phrónēsis is a derivative of the verb phroneîn “to think, be minded, be wise”; phroneîn in turn is a derivative formed from the noun phrēn (stem phren-), whose myriad meanings include “midriff, diaphragm, heart (as seat of the passions and bodily appetites), mind (seat of the mental faculties and perception).” Phronesis entered English in the 16th century.
"[Aristotle’s] concept of practical wisdom or phronesis involved constantly weighing the relative value of arguments in the face of decisions and actions."