'Guarded' in the Bible

While I was with them, I kept them in thy name which thou hast given me: and I guarded them, and not one of them perished, but the son of perdition; that the scripture might be fulfilled.

And when we entered into Rome, Paul was suffered to abide by himself with the soldier that guarded him.

In Damascus the governor under Aretas the king guarded the city of the Damascenes in order to take me:

who by the power of God are guarded through faith unto a salvation ready to be revealed in the last time.