sleep — to take the rest afforded by a suspension of voluntary bodily functions and the natural suspension, complete or partial, of consciousness; cease being awake.
vegetate — to grow in, or as in, the manner of a plant.
winter — the cold season between autumn and spring in northern latitudes (in the Northern Hemisphere from the winter solstice to the vernal equinox; in the Southern Hemisphere from the summer solstice to the autumnal equinox).
