'Fro' in the Bible

And he sent out a raven; {it went to and fro} until the waters were dried up from upon the earth.

He returned and went {to and fro} in the house one time, then he went up and bent over him. Then the boy sneezed seven times and opened his eyes.

Does the ax boast against the one who cuts with it, or the saw magnify itself against [the] one who moves it to and fro? {As if a rod should move the one who lifts it}! {As if a staff should lift up that which is not wood}!

[The] earth staggers to and fro like the drunkard, and it sways like hut, and its transgression is heavy upon it, and it falls and does not rise again.

I looked at the mountains, and behold, they were quaking, and all of the hills were jolted to and fro.

As for the likeness of the living creatures, their appearance [was] like burning coals of fire, like the appearance of torches. It [was] moving to and fro between the living creatures, and {the fire was very bright} and lightning [was] going out from the fire.

And the living creatures {were speeding to and fro} like the appearance of lightning.