Arsenia \a-rse-nia, ar-senia\ as a girl's name is pronounced ar-SEE-nee-ah. It is of Spanish and Greek origin, and the meaning of Arsenia is "masculine". Feminine form of Arsenio. Saint Arsenius (fourth century) is famous for the saying, "I have often been sorry for having spoken, but never for having held my tongue".
A baby name that sounds like Arsenia is Arizona.