Cogitate

1. (v. i.) To engage in continuous thought; to think.

2. (v. t.) To think over; to plan.

Thesaurus Entries

cerebrate, conceive, conceptualize, entertain ideas, excogitate, exercise the mind, form ideas, give thought to, ideate, intellectualize, puzzle out, reason, reason out, sort out, think, think about, think out, think through