rumination
Rumination (noun) means the habit of going over the same distressing thought again and again without ever reaching a resolution. Example: “Rumination keeps the argument alive in your head long after it ended.”
How to use rumination
Learner’s notesIn plain EnglishTurning the same thought over and over in your head.
Sense 1 is clinical, sense 2 literary; both are common.
The verb is ruminate, and it takes on or about: to ruminate on a decision.
Trace the full origin ↓Fill the gap
Can you complete this real example?
_____ keeps the argument alive in your head long after it ended.
Etymology
From Latin ruminari "to chew the cud, turn over in the mind", from rumen "throat, gullet".