" dwell upon "

1: to speak or write about insistently and usually tiresomely;

  * e.g., " ... she was always dwelling on past insults and snubs, both real and imagined "

•  Synonyms : 

•  belabor,

•  harp (on)

•  Antonyms : 

•  disregard,

•  forget,

•  ignore,

•  overlook,

•  overpass,

•  pass over,

•  slight,

•  slur (over)