He is to have the woman drink the bitter water that brings a curse, and it will enter her and may cause her bitter suffering.
KJV
And he shall cause the woman to drink the bitter water that causeth the curse: and the water that causeth the curse shall enter into her, [and become] bitter.
ASV
and he shall make the woman drink the water of bitterness that causeth the curse; and the water that causeth the curse shall enter into her and become bitter.