γυμνοσοφιστεία
From LSJ
Μισθὸς διδάσκει γράμματ', οὐ διδάσκαλος → Pretium docet te, non praeceptor, litteras → Der Lehrer lehrt das Lesen nicht, es ist der Lohn
Wikipedia EN
Gymnosophy (from Greek γυμνός gymnós "naked" and σοφία sophía "wisdom") was a movement and a philosophy practiced in Europe and the US from the end of the 19th century to the mid 20th century. The practice involved nudity, asceticism, and meditation.
