φορβεία

From LSJ

ἀσκεῖν περὶ τὰ νοσήματα δύο, ὠφελεῖν 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

Source

Middle Liddell

φορβεία, ἡ, φορβή
I. a feeding-string, i. e. the halter by which a horse is tied to the manger, Xen.
II. a mouthband of leather put like a halter round the lips of pipers, to assist them in blowing, Ar.