Complex sentence: Widdershins (sometimes withershins, widershins or widderschynnes) is a word which (usually) means counterclockwise, however in certain circumstances it can be used to refer to a direction which is against the light, i.e. where you are unable to see your shadow.
Split into simpler sentences: Widdershins (sometimes withershins, widershins or widderschynnes) is a word which (usually) means counterclockwise. However, in certain circumstances it can be used to refer to a direction which is against the light, i.e. where you are unable to see your shadow.