ruminate about (something)

ruminate about (something)

To give great consideration to something; to ponder on or think about something very deeply. We sat ruminating about various ways to improve our business model when Janet suddenly came up with a brilliant idea. Well, your review has certainly given me plenty to ruminate about.
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ruminate about something

 and ruminate on something
to ponder and think about something. (Alludes to a cow, relaxing and chewing its cud, as if it is thinking.) He sat, ruminating about the events of the day, humming and eating peanuts. Let me ruminate on this a little bit.
See also: ruminate