G2901–κραταιόω–krataioō

And the child grew, and became strong in spirit, and was in the deserts till the day of his showing to Israel.

ἐκραταιοῦτο ekrataiouto “he was strengthened”

And the child grew, and became strong in spirit, filled with wisdom: and the grace of God was upon him.

ἐκραταιοῦτο ekrataiouto “He was being strengthened”

Watch ye, stand fast in the faith, acquit yourselves like men, be strong.

κραταιοῦσθε. krataiousthe “do be strong.”

That he would grant you according to the riches of his glory to be strengthened with might by his Spirit in the inner man;

κραταιωθῆναι krataiōthēnai “to be strengthened”