G1991 — episterizo
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
episterizo — pronounced ep-ee-stay-rid'-zo
from 1909 and 4741; to support further, i.e. reestablish:--confirm, strengthen. see GREEK for 1909 see GREEK for 4741
4 occurrences in the KJV.
Acts 14:22
Confirming the souls of the disciples, and exhorting them to continue in the faith, and that we must through much tribulation enter into the kingdom of God.
Acts 15:32
And Judas and Silas, being prophets also themselves, exhorted the brethren with many words, and confirmed them.
Acts 15:41
And he went through Syria and Cilicia, confirming the churches.
Acts 18:23
And after he had spent some time there, he departed, and went over all the country of Galatia and Phrygia in order, strengthening all the disciples.