hammer away

hammer away (third-person singular simple present hammers away, present participle hammering away, simple past and past participle hammered away)

2. (idiomatic, intransitive) To continue discussing or trying to solve. [with at ‘a subject or problem’]
4. Used other than figuratively or idiomatically: see hammer,‎ away.

• “hammer away” in Longman Dictionary of Contemporary English, Longman.
• “hammer away”, in Cambridge English Dictionary, Cambridge, Cambridgeshire: Cambridge University Press, 1999–present.