rumination....

ru·mi·nate

  /ˈruməˌneɪt/ [roo-muh-neyt] verb, -nat·ed, -nat·ing. verb

(used without object)

1. to chew the cud, as a ruminant.

2. to meditate or muse; ponder.

verb (used with object)

3. to chew again or over and over.

4. to meditate on; ponder.