1)
What is the meaning of "va'Yizen"?
1.
'Rashi': 'Zenus' applies to anyone who abandons and switches fear of Hashem for idolatry, for he is like a [married] woman who is Mezanah and does adultery, like "Zano Sizneh ha'Aretz [me'Acharei Hashem]" (Hoshe'a 1:2), "v'Zanah Acharei Elokei Nechar ha'Aretz" (Devarim 31:16).
2.
Malbim: Whenever an expression of Zenus applies to a gathering, it refers to idolatry.
