blacken
From LSJ
σκληρόν σοι πρὸς κέντρα λακτίζειν → it is hard for thee to kick against the pricks, it is hard for you to kick against the goads
English > Greek (Woodhouse)
v. trans.
Lit., P. and V. μελαίνειν.
make dirty: V. αἰθαλοῦν; see soil.
Met.: Blacken the character, etc.: P. and V. διαβάλλειν.