muse

[1]	cogitate , meditate , reflect , contemplate , ruminate , think over , think about , consider , chew over , deliberate , revolve , weigh , evaluate , study , mull over , brood (over) , ponder , be absorbed (in thought) , be in a brown study , dream , day-dream , be in a trance/reverie
[2]	chew over , think over , meditate , ponder , excogitate , contemplate , reflect , mull , mull over , ruminate , speculate