Harp on(verb)
Meaning: Talk or write persistently and tediously on (a particular topic)
Synonyms: Keep On About, Go On About, Persist In Talking About, Keep Talking About, Labour The Point About, Dwell On
Antonyms: Dismiss, Push Aside, Ignore, Disregard
Example: I don't want to harp on about the past.
Trick to remember: Harpic acha toilet clenar h is par harp on kar raha h 
