G5432–φρουρέω–phroureō

In Damascus the ethnarch of Aretas the king kept the city of the Damascenes shut up, wishing to take me;

ἐφρούρει ephrourei “was guarding”

But before faith came, we were guarded under law, shut up to faith [supplied: which was] about to be revealed.

ἐφρουρούμεθα ephrouroumetha “we were held in custody”

and the peace of God, which surpasses every understanding, shall guard your hearts and your thoughts by Christ Jesus.

φρουρήσει phrourēsei “will guard”

who are kept guarded by [supplied: the] power of God through faith for salvation ready to be revealed in [supplied: the] last time.

φρουρουμένους phrouroumenous “[are] being guarded”