G2727–κατηχέω–katēcheō

that thou mayest know the certainty of the things wherein thou wast instructed.

κατηχήθης katēchēthēs “you were instructed”

this one was instructed in the way of the Lord, and being fervent in the Spirit, was speaking and teaching exactly the things about the Lord, knowing only the baptism of John;

κατηχημένος katēchēmenos “instructed”

and they are instructed concerning thee, that apostacy from Moses thou dost teach to all Jews among the nations, saying -- Not to circumcise the children, nor after the customs to walk;

κατηχήθησαν katēchēthēsan “They have been informed”

these having taken, be purified with them, and be at expence with them, that they may shave the head, and all may know that the things of which they have been instructed concerning thee are nothing, but thou dost walk -- thyself also -- the law keeping.

κατήχηνται katēchēntai “they have been informed”

and dost know the will, and dost approve the distinctions, being instructed out of the law,

κατηχούμενος katēchoumenos “being instructed”

but in an assembly I wish to speak five words through my understanding, that others also I may instruct, rather than myriads of words in an `unknown' tongue.

κατηχήσω, katēchēsō “I may instruct,”

And let him who is instructed in the word share with him who is instructing -- in all good things.

κατηχούμενος katēchoumenos “being taught”κατηχοῦντι katēchounti “teaching”