DictionaryobsessPersistent preoccupation
verb

obsess

uhb-SESS/əbˈses/

To occupy someone's mind or dwell on something persistently, often in a troubling way.

The unfinished puzzle obsesses the woman, distracting her through breakfast, work, and bedtime.

A difficult unfinished jigsaw puzzle obsesses a woman: across breakfast, work and bedtime, her attention remains painfully captured by the same puzzle while ordinary activities go unfinished.
Etymology

Literally sitting opposite or against someone supplied the image of a siege. The meaning moved from besieging to haunting, then to a fixed idea that persistently troubles the mind.

In context

Luke Ford Livestreams50:11
people such as myself have anxious attachment where we tend to obsess over our relationships and because we're so obsessed about them, we tend to do them harm
Integrated: Living Beyond the Sex Trade (7-20-21)

More examples

  • Try not to obsess about things you cannot control.
  • He spent the weekend obsessing over one awkward conversation.
  • The unanswered question obsesses him for days.

Forms

obsess · obsesses · obsessed · obsessing

obsession noun — A persistent and often troubling preoccupation.

obsessive adjective — Persistently preoccupied with particular thoughts or concerns.

Similar words

preoccupy
Occupies someone's attention without necessarily causing distress or repetitive thinking.
fixate
Focuses rigidly on one thing, often overlooking everything else.
brood
Dwells unhappily on worries, disappointments, or past events.