Then you prostituted yourself with the Assyrians, because you were not yet satisfied. Even after that, you were still not satisfied.
KJV
Thou hast played the whore also with the Assyrians, because thou wast unsatiable; yea, thou hast played the harlot with them, and yet couldest not be satisfied.
ASV
Thou hast played the harlot also with the Assyrians, because thou wast insatiable; yea, thou hast played the harlot with them, and yet thou wast not satisfied.