to chew over again, as food previously swallowed and regurgitated
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ruminate
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rechew
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cull
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recapitulate
A
Correct answer
Explanation
Ruminate literally means to chew cud - bringing up food from the stomach and chewing it again (as cows do). Figuratively, it means to think deeply about something by going over it repeatedly in one's mind. The word comes from Latin rumina meaning throat. This matches the definition perfectly.