φαρμακός

Noun

 * 1) one sacrificed or executed as an atonement or purification; scapegoat
 * 2)  criminal, worthless fellow

Usage notes
The second vowel is either long or short, φαρμᾱκός in Hipponax Iambographus and Callimachus Epicus; φαρμᾰκός in Aristophanes (Equites); on the accent see Herodianus (Grammar 1.150); φαρμᾶκος in Harpocration (citying Didymus).