harp on
US /hɑːrp ɑːn/
UK /hɑːrp ɑːn/

1.
membicarakan terus-menerus, mengungkit-ungkit
to talk or write persistently and tediously on a particular subject
:
•
He keeps harping on about the good old days.
Dia terus-menerus membicarakan masa lalu yang indah.
•
I wish she wouldn't harp on my mistakes.
Aku berharap dia tidak terus-menerus membicarakan kesalahanku.