γυμνάζειν

From LSJ

ἀναπλασμὸς ἐκ ματαίων ἐλπίδων → building of castles in the air

Source

Greek > English (Woodhouse Verbs Reversed)

(see also γυμνάζω): afflict, annoy, distress, exercise, exhaust, fatigue, grieve, harass, harden, tax, train, trouble, vex, give play to, wear out