cerebrate

How to sign: use or exercise the mind or one's power of reason in order to make inferences, decisions, or arrive at a solution or judgments
"I've been thinking all day and getting nowhere";

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See also: think over, dream up, think up, think out, mull over, mull, muse, ponder, meditate, chew over, excogitate, ruminate, hatch, reflect, speculate, contemplate, concoct, think of

Similiar / Same: cogitate, think

Within this category: associate, brainstorm, chew over, concentrate, give, judge, philosophize, plan, puzzle over, rationalize, reason, reason, study, think, think, think, think about