from The Century Dictionary and Cyclopedia
- Not shaken; unshaken.
Sorry, no etymologies found.
When I turned to the other, offering my hand, all I got in return was a scowl as my hand hung, unshook.
It almost sounds like a concussion bomb which we hear during war just like boom unshook and I thought the coal was going to start falling down.
You can only hold out an unshook hand for so long before your arm muscles get tired.