Sentence:  The Agadic tradition has preserved another element of the Noah-myth. The wicked black son Ham (Châm), <WSD>emasculates</WSD> his father [...]. The emasculation of the Sun, when the Sun is male, is an expression of Aryan mythology denoting the weakening of his rays before and at sunset. The black son, the Night, overcomes and <WSD>emasculates</WSD> his father, takes all power from his rays and drives him to ruin. 
Meaning of the word marked with <WSD> tags:  To deprive of masculine vigor or spirit; to weaken; to render effeminate; to vitiate by unmanly softness. (from early 17th c.)