The term Venus' Sister can refer to three different crossword solutions: Selena (6 letters), Serena (6 letters), and Abated (6 letters). Selena and Serena are both names, and they are often used as a reference to the two Williams sisters, professional tennis players. Abated is an adjective meaning to have been reduced or lessened in intensity or severity. It is often used in the context of a storm or other natural phenomenon.