verb

harp

To talk or complain repeatedly about the same subject.

He harps on the same complaint throughout dinner.

Etymology

The figurative verb evokes repeatedly sounding the same musical theme. Harping on a subject keeps returning to it until the repetition becomes tiresome.

More examples

She harped about the delay.
They are harping on a minor error.
Do not harp on his old mistake.

Forms

harp · harps · harped · harping

Similar words

dwell: Dwell on a subject need not involve complaint.
nag: Nag often directs repeated demands at someone.