οἴνῳ τὸν οἶνον ἐξελαύνειν → chase out the wine with wine, take a hair of the dog that bit you, try to drive out the wine with wine
See vice.
bitterness: P. and V. πικρότης, ἡ.
of horse: P. χαλεπότης, ἡ (Xen.).