σκιαμαχία
From LSJ
κρεῖττον εἶναι φιλοσόφως ἀποθανεῖν ἢ ἀφιλοσόφως ζῆν → that it is better to die in manner befitting a philosopher than to live unphilosophically
English (LSJ)
ἡ,
A a fighting against a shadow: esp. a form of exercise with hands and feet, Ph.1.153. 2 metaph., fighting with a shadow, mock-fight, 'beating the air', Cic.Fam.11.14.1 (pl.), Plu.2.514d, Eust.663.16; title of satire by Varro, Non.p.190 L.—σκιομαχία is a later form, Gal.6.146.