dwell on

dwell on

1. (transitive) To continue to think or talk about.
   • 1991 May 12, "Kidnapped!" Jeeves and Wooster, Series 2, Episode 5:

     Jeeves: Foreign travel often liberates emotions best kept in check, sir. The air of North America is notoriously stimulating in this regard, as witness the regrettable behavior of its inhabitants in 1776.
     B. Wooster: Hm? What happened in 1776, Jeeves?
     Jeeves: I prefer not to dwell on it, if it's convenient to you, sir.

   • 2015 May 25, Daniel Taylor, “Norwich reach Premier League after early blitz sees off Middlesbrough”, in The Guardian (London)‎:

     Middlesbrough will wonder whether it might have been different if the volley that Jelle Vossen slashed towards John Ruddy’s net after nine minutes had been a couple inches lower rather than clanging off the crossbar. They should not dwell on that moment too long, however.

   Steven, stop dwelling on the past!
   But you stole my kidney!

• dwell upon