G2901–κραταιόω–krataioō

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

ἐκραταιοῦτο ekrataiouto “he was strengthened”

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

ἐκραταιοῦτο ekrataiouto “He was being strengthened”

Watch ye, stand fast in the faith, quit you like men, be strong.

κραταιοῦσθε. krataiousthe “do be strong.”

that he would grant you, according to the riches of his glory, that ye may be strengthened with power through his Spirit in the inward man;

κραταιωθῆναι krataiōthēnai “to be strengthened”