ETYM Icel. skîth a billet of wood. Related to Shide.
An unexpected slide; SYN. slip, sideslip.

ETYM AS. slîde.
1. A sloping chute down which children can slide.
2. The act of sliding or gliding; SYN. glide.
3. Flat rectangular piece of glass on which specimens can be mounted for microscopic study.
4. (Geology) The descent of a large mass of earth or rocks or snow etc.