The word "dwell" means to live or reside in a particular place. It can also mean to think or speak about something at length, often with a focus on negative thoughts or feelings. Essentially, it describes both a physical location of living and a mental state of lingering on thoughts.
The word "dwell" comes from Old English "dwellan," which means to lead astray or delay, derived from a Germanic root. Over time, its meaning evolved to signify a more general sense of residing or living in a particular location.