dwell

/ˈdwel/

Middle English, from Old English dwellan to go astray, hinder; akin to Old High German twellen to tarry

verb

  1. to remain for a time

  2. to live as a resident

  3. exist, lie

dwell in the hallway

phrasal verb

  1. to think or talk about (something) for a long time

There is no need to dwell on the past.