G5442H–φυλάσσω–phulassō

For already He had been commanding the foul spirit to come out of the man. For many a time it had seized and held him, and they had repeatedly put him in chains and fetters and kept guard over him, but he used to break the chains to pieces, and, impell

φυλασσόμενος, phulassomenos “being kept,”

"Whenever a strong man, fully armed and equipped, is guarding his own castle, he enjoys peaceful possession of his property;

φυλάσσῃ phulassē “may guard”

He had him arrested and lodged in jail, handing him over to the care of sixteen soldiers; and intended after the Passover to bring him out again to the people.

φυλάσσειν phulassein “to guard”

he said, "I will hear all you have to say, when your accusers also have come." And he ordered him to be detained in custody in Herod's Palace.

φυλάσσεσθαι phulassesthai “to be guarded”

Upon our arrival in Rome, Paul received permission to live by himself, guarded by a soldier.

φυλάσσοντι phulassonti “is guarding”