ruminate
     v 1: chew the cuds; "cows ruminate"
     2: reflect deeply on a subject; "I mulled over the events of
        the afternoon"; "philosophers have speculated on the
        question of God for thousands of years"; "The scientist
        must stop to observe and start to excogitate" [syn: {chew
        over}, {think over}, {meditate}, {ponder}, {excogitate}, {contemplate},
         {muse}, {reflect}, {mull}, {mull over}, {speculate}]
Source: WordNet® 2.0