cerebrate

Verb (intransitive)

cer=e=brate

WORDNET DICTIONARY

cerebrate(v = verb.cognition) cogitate, think - 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"

Derived form noun cerebration₁

Sample sentence:
Somebody ----s

cerebrate, v. i.

To exhibit mental activity; to have the brain in action. [1913 Webster]