Ἄρεος
From LSJ
ἀσκέειν, περὶ τὰ νουσήματα, δύο, ὠφελέειν, ἢ μὴ βλάπτειν → strive, with regard to diseases, for two things — to do good, or to do no harm | as to diseases, make a habit of two things — to help, or at least, to do no harm
English (LSJ)
α, ον, collat. form of Ἄρειος, Ἀρέα (sc. κρήνη)
A the spring of Ares, Pi.N.9.41.