שָׂטָן
From LSJ
Δούλου γὰρ οὐδὲν χεῖρον οὐδὲ τοῦ καλοῦ → Res nulla servo peior est, etiam bono → Ein Sklave ist das schlechteste, selbst wenn er gut
English (Strong)
from שָׂטַן; an opponent; especially (with the article prefixed) Satan, the arch-enemy of good: adversary, Satan, withstand.