Beowulf battles Grendel's mother in a battle hall under a lake. He first swims through this lake in order to arrive to this icy battle hall. There is ice everywhere, and it is very cold. This is the poem's representation of hell - in some mythologies, hell is represented as a freezing place, as opposed to fiery doom.
The definition is capable of being moved. So, idk, an inanimate object or person; anything. Being moved. I´m sorry, I hope this helps you. I´m not really sure how to answer.