1)
Will Hashem stick his tongue to his palate?!
1.
Radak: It is as if it is stuck to his palate. He will be silent, i.e. he will not speak to them or rebuke them.
2.
Malbim: Not only will you not prophesize to them. You will not even rebuke them amidst Sechel, for they are Beis Meri, and surely they will not hear rebukes.
