Verb

• S: (v) chew over, think over, meditate, ponder, excogitate, contemplate, muse, reflect, mull, mull over, ruminate, speculate (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"
• S: (v) study, meditate, contemplate (think intently and at length, as for spiritual purposes) "He is meditating in his study"