G5442H–φυλάσσω–phulassō

For he had commanded the unclean spirit to go out from the man. For very often it had seized him; and he had been bound, kept with chains and fetters; and breaking the bonds he was driven by the demon into the deserts.

φυλασσόμενος, phulassomenos “being kept,”

When the strong [supplied: man] armed keeps his own house, his goods are in peace;

φυλάσσῃ phulassē “may guard”

whom having seized he put in prison, having delivered him to four quaternions of soldiers to keep, purposing after the passover to bring him out to the people.

φυλάσσειν phulassein “to guard”

he said, I will hear thee fully when thine accusers also are arrived. And he commanded him to be kept in Herod's praetorium.

φυλάσσεσθαι phulassesthai “to be guarded”

And when we came to Rome, [supplied: the centurion delivered up the prisoners to the praetorian prefect, but] Paul was allowed to remain by himself with the soldier who kept him.

φυλάσσοντι phulassonti “is guarding”