Beautiful thoughts and a well mind. Eunoia is the shortest English word containing all five main vowel graphemes. It comes from the Greek word εὔνοια, meaning “well mind” or “beautiful thinking.
meraki, greek // 28 Beautiful Words The English Language Should Steal
Kefi (κεφι) Greek -- the spirit of joy enthusiasm, high spirits and frenzy, in which good times and passion for life are expressed with an abundance of excitement, happiness and fun (via Wordstuck)