Ishbosheth couldn’t say a single word in reply to Abner because he was afraid of him.
And he could not answer Abner a word again, because he feared him.
And Ish-bosheth could not answer Abner a word, because he feared him.
And he could not answer Abner another word, because he feared him.
And he was not able to respond anything to him, because he was in fear of him.