give warning. testify.
ear is uncircumcised. Reference to Pentateuch (Exodus 6:12; Exodus 6:30; Leviticus 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 Jeremiah 6:10. reproach; in Jeremiah 8:9, rejected; in Jeremiah 17:15, scoffed at; in Jeremiah 23:36, perverted.
they. So the Mugah Codex quoted in the Massorah. But other codices, with three early printed editions, read "and they".