The term 'dwelled (on)' can be broken down into two crossword solutions, 'HARPED' and 'BROODED'. 'HARPED' is a 6-letter word meaning to talk or complain persistently and tediously. 'BROODED' is a 7-letter word meaning to think deeply and at length, usually about something that causes worry or sadness. Together, these two words suggest that the term 'dwelled (on)' means to think deeply and at length about something that causes worry or sadness, and to talk or complain persistently and tediously about it.