To continue to think or talk about (something or someone).(verb)
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Use "dwell on" in a sentence
"As with depression, trauma survivors who dwell on the past tend to stay in past-negative or-fatalistic mind-sets that impede their presence in the present as well as their ability to look toward a positive future."
"Let me dwell on this remark because it is an excellent excuse: When Harold pronounced the name Barcola there next to the ninth green on that hot afternoon, I believe it set off a series of chemical reactions in my brain that made golf success, or further golf success, however modest, unlikely."
"“Your excellencys good sense will render it unnecessary for me to dwell on this subject and your regard for the Public Interest, will I am confident interest you most deeply in facilitating a compliance.”"