G2727–κατηχέω–katēcheō

That thou mayest know the certainty of those things in which thou hast been instructed.

κατηχήθης katēchēthēs “you were instructed”

This man was instructed in the way of the Lord: and being fervent in the spirit, he spoke and taught diligently the things of the Lord, knowing only the baptism of John.

κατηχημένος katēchēmenos “instructed”

And they are informed concerning thee, that thou teachest all the Jews who are among the Gentiles to forsake Moses, saying, That they ought not to circumcise their children, neither to walk after the customs.

κατηχήθησαν katēchēthēsan “They have been informed”

Take them, and purify thyself with them, and be at charges with them, that they may shave their heads: and all may know that those things of which they were informed concerning thee, are nothing; but that thou thyself also walkest orderly, and keepest the law.

κατήχηνται katēchēntai “they have been informed”

And knowest his will, and approvest the things that are more excellent, being instructed out of the law,

κατηχούμενος katēchoumenos “being instructed”

Yet in the church I had rather speak five words with my understanding, that by my voice I may teach others also, than ten thousand words in an unknown language.

κατηχήσω, katēchēsō “I may instruct,”

Let him that is taught in the word communicate to him that teacheth in all good things.

κατηχούμενος katēchoumenos “being taught”κατηχοῦντι katēchounti “teaching”