Merriam-Webster Collegiate Dictionary - catechize

 transitive verb  (-chized; -chizing)  Etymology: Late Latin catechizare, from Greek katechein to teach, literally, to din into, from kata- cata- + echein to resound, from eche sound — more at echo  Date: 15th century  1. to instruct systematically especially by questions, answers, and explanations and corrections; specifically to give religious instruction in such a manner  2. to question systematically or searchingly  • catechization noun  • ~r noun