cat·e·chize / ˈkatəˌkīz/ • v. [tr.] instruct (someone) in the principles of Christian religion by means of question and answer, typically by using a catechism. ∎ fig. put questions to or interrogate (someone).DERIVATIVES: cat·e·chiz·er n.

catechize give systematic oral instruction XV; question systematically (from the question-and-answer form of the Church Catechism) XVII. — ChrL. catēchīzāre — ecclGr. katēkhízein, f. katēkheíîn sound through, instruct orally, f. CATA- 5 + ēkheîn sound; see -IZE.
So catechism catechetical instruction; manual of religious instruction in the form of question and answer. XVI. catechetic(al) XVII.