Hieme vero humus crustata frigoribus et tamquam levigata ideoque labilis incessum praecipitantem impellit; et patulae valles per spatia plana glacie perfidae vorant non numquam transeuntes.
But during winter, the ground becomes covered with ice, which makes it appear polished and therefore slippery. This causes men to lose their footing and stumble while walking, and the flat areas of the spreading valleys, made treacherous by ice, occasionally engulf travelers.