I was challenged to show that polygamy is adultery. The gentleman challenged me, and I will now proceed to prove it. As adultery is distinguished in Scripture from whoredom and fornication, it is proper to ascertain the exact meaning of the words as used by the sacred writers. The word translated whoredom is from the Hebrew verb Zanah and the Greek pornica, and means pollution, defilement, lewdness, prostitution and, in common parlance, whoredom, the prostitution of the body for gain. The word translated fornication is from the same Hebrew verb, and in general, signifies criminal, sexual intercourse without the formalities of marriage. Adultery is from the Hebrew word Naaph and the Greek word Moicheia, and is the criminal intercourse of a married woman with another man than her husband, or of a married man with any other woman than his wife. This is indicated by the philological significance of the term adulterate, compounded of two words meaning to another, as the addition of pure and impure liquors, or of an alloy with pure metal. Adulterer is from the Hebrew Naaph and the Greek Moichos, which mean as above. The material question to be settled is, Is the Hebrew word Naaph and the Greek word Moichos or Moicheia confined to the criminal sexual intercourse between a man, married or unmarried, with a married woman? This is the theory of the Mormon polygamists; but I join issue with them and assert that the Scriptures teach that adultery is committed by a married man who has sexual intercourse with a woman other than his wife, whether said woman is married or unmarried. It is conceded that he is an adulterer who has carnal connection with a woman married or betrothed. Thus far we agree. Now can it be proved that the sin of adultery is committed by a married man having carnal connection with a woman neither married nor betrothed! To prove this point I argue: First, that the Hebrew word Naaph, translated in the seventh commandment, adultery, does include all criminal sexual intercourse. It is a generic term and the whole includes the parts. It is like the word kill in the sixth commandment, which includes all those passions and emotions of the human soul which lead to murder, such as jealousy, envy, malice, hatred, revenge. So this word Naaph includes whoredom, fornication, adultery, and even salacial lust. Matthew v, 27, 29. Second. The terms adultery and fornication are used interchangeably by our Lord, and mean the same thing. A married woman copulating with a man other than her husband is admitted to be adultery, but the highest authority we can bring forward calls the act fornication. Matthew v, 3, 2. Romans vii, 2, 3. 1st Corinthians vii, 1, 4.