Sentence:  But there are many people who hear the Word but are resistant to it and the Holy Spirit. They have <WSD>uncircumcised</WSD> ears defined by Jeremiah thusly: “To whom can I speak and give warning? Who will listen to me? Their ears are closed so they cannot hear. The Word of the LORD is offensive to them; they find no pleasure in it" (Jer. 6:10). 
Meaning of the word marked with <WSD> tags:  Spiritually impure; irreligious.