ear is uncircumcised. Reference to Pentateuch (Exo_6:12, Exo_6:30. Lev_26:41). Figure of speech Catachresis (App-6). An ear not brought into the covenant.
a reproach. Note the fate of Jehovah's word in the down-grade of Jeremiah's days. in Jer_6:10 a reproach; in Jer_8:9, rejected; in Jer_17:15, scoffed at; in Jer_23:36, perverted.
they. So the Mugah Codex quoted in the Massorah. But other codices, with three early printed editions, read "and they".