ˈdwell on ˈdwell u ˌpon [transitive] [present tense I/you/we/they dwell on he/she/it dwells on present participle dwelling on past tense dwelled on dwelt on past participle dwelled on dwelt on] phrasal verb
to spend a lot of time thinking or talking about something unpleasant
He tends to dwell on the negative aspects of his performance.
Thesaurus: to think carefully or a lot about thingssynonym
Main entry: dwell
Useful english dictionary. 2012.