Eunoia
In rhetoric, eunoia is the goodwill a speaker cultivates between themself and their audience, a condition of receptivity. In Book VIII of the Nicomachean Ethics, Aristotle uses the term to refer to the kind and benevolent feelings of goodwill a spouse has which form the basis for the ethical foundation of human life. Cicero translates εὔνοιᾰ with the Latin word referring to a state of normal mental health. Eunoia is the shortest English word containing all five main vowel graphemes.