hammer away at
US /ˈhæm.ər əˈweɪ æt/
UK /ˈhæm.ər əˈweɪ æt/

1.
bekerja keras pada, terus-menerus mengulang
to work hard and persistently at something
:
•
She had to hammer away at the problem for hours before she found a solution.
Dia harus bekerja keras pada masalah itu selama berjam-jam sebelum dia menemukan solusinya.
•
The team continued to hammer away at the project despite the setbacks.
Tim terus bekerja keras pada proyek itu meskipun ada kemunduran.