harp

A musical instrument consisting of a body and a curved neck, strung with strings of varying length that are stroked or plucked with the fingers and are vertical to the soundboard when viewed from the end of the body

A harmonica.

A grain sieve.

(usually with on) To repeatedly mention a subject.

“Why do you harp on a single small mistake?”

To play on (a harp or similar instrument)

To play (a tune) on the harp.

To develop or give expression to by skill and art; to sound forth as from a harp; to hit upon.