Shield-burg, a fortress built of shields. Burg means either a town, a castle, or a fortress.
Shield-wall, the defence made by fighting men holding their shields close together as they stand at bay.
Shift, n. a trick, cunning plan, e.g. "my cunning shifts;" v. to contrive, be able, e.g. "the man whose heart and hand may shift, To pluck it from the oak-wood."
Shimmer, to gleam and change colour as the light alters.
Skerry, a rocky island near the coast.
Slaked, cooled, put out; used of anything that has been burning and is now grown cold.
Sleight, cunning, trickery. Loki is called "the Master of Sleight" because of his skill in deceit.
Sleipnir, Odin's horse. It was grey, had eight feet, and could carry him over sea and land, and could also fly through the air.
Slot, the track left by a wild animal.
Sloth, idleness.