rumination

/ˌruːmɪˈneɪʃən/
noun
  1. The act of thinking deeply and repeatedly about something, often in a way that is not productive or causes worry.
    • He broke his rumination by going for a walk.
    • Too much rumination can lead to anxiety and stress.
    • Her rumination about the argument kept her awake all night.
  2. The process of chewing cud, as done by cows, sheep, and other ruminant animals.
    • Rumination allows animals to extract more nutrients from tough plants.
    • Farmers observe the rumination of their cattle to check their health.
    • The cow's rumination is essential for digesting grass.
Antonyms
What does "rumination" mean? | whatsthatwordmean | whatsthatwordmean