harp noun
VERB + HARP set, tune By means of pedals, a harp can be set in any desired key. > Special page at MUSIC
harp verb PHRASAL VERBS harp on
ADV. always, constantly He is always harping on about the war. | still
PREP. about
PHRASES keep harping on Don't keep harping on about my age!
You can also check other dicts: harp (English, 中文解释 ), wordnet sense, Collins Definition