1.think moodily or anxiously about something
2.originate (in);
The problems dwell in the social injustices in this country
3.make one's home or live in;
She resides officially in Iceland
4.come back to;
Don't dwell on the past
dwell【‘dwel】 【V】居住,棲息 He dwelled in a broken cottage on the hillside. dwell on/upon sth.嘮叨;不停叨念,提及