harp on (something)

to repeat something many times in an annoying way.

I'm tired of people who keep harping on what is wrong with the country.

Usage notes: said especially about complaints

• rung on the ladder
• run high
• run in place
• run interference
• run in the family
• run into
• run into someone
• run into something
• run into the ground
• run its course
• run like clockwork
• run like the wind
• run low
• run mouth
• running battle
• running battle with
• running battle with someone
• running battle with something
• running on empty
• running on fumes
• run off
• run off at the mouth
• run off something
• run off with
• run off with someone