When he has made her drink the water, if she has defiled herself and been unfaithful to her husband, then the water that brings a curse will enter her and cause bitter suffering; her belly will swell, her thigh will shrivel, and she will become accursed among her people.
KJV
And when he hath made her to drink the water, then it shall come to pass, [that], if she be defiled, and have done trespass against her husband, that the water that causeth the curse shall enter into her, [and become] bitter, and her belly shall swell, and her thigh shall rot: and the woman shall be a curse among her people.
ASV
And when he hath made her drink the water, then it shall come to pass, if she be defiled, and have committed a trespass against her husband, that the water that causeth the curse shall enter into her and become bitter, and her body shall swell, and her thigh shall fall away: and the woman shall be a curse among her people.