The word catechism comes from the Greek word κατηχέω (Katecheo; Strong's G2727), meaning "to instruct" or "to teach". Catechisms are used primarily in reference to teaching Christian doctrine, although they may be used in other contexts.
Κατηχέω is used several times in the Greek New Testament:
- Luke 1:4 (ESV) - that you may have certainty concerning the things you have been taught
- Acts 18:25 (ESV)...