FROM STRONG’S GREEK DICTIONARY (1890)

Strong’s Greek Dictionary (1890) — public domain, printed whole.

katecheo κατηχέω — kat-ay-kheh'-o — from 2596 and 2279; to sound down into the ears, i.e. (by implication) to indoctrinate ("catechize") or (genitive case) to apprise of:--inform, instruct, teach.

see GREEK for 2596

see GREEK for 2279