不及物动词用脑筋，思考

1. 思考：cerebralism 大脑机能论 | cerebrate 思考 | cerebratmon 脑髓作用

2. 用脑：cerebrale 脑病性 | cerebrate 用脑 | cerebration 大脑作用

3. 用脑筋/思考：cerebrasthenia /脑病性衰弱/ | cerebrate /用脑筋/思考/ | cerebration /脑髓作用/思考/

verb

1. use or exercise the mind or one's power of reason in order to make inferences, decisions, or arrive at a solution or judgments

    e.g. I've been thinking all day and getting nowhere

    Synonym: thinkcogitate