ASV: Thou wilt give them hardness of heart, thy curse unto them.

BBE: You will let their hearts be covered over with your curse on them.

DBY: give them obduracy of heart, thy curse unto them;

KJV: Give them sorrow of heart, thy curse unto them.

JPS: Thou wilt give them hardness of heart, Thy curse unto them.

WBS: Give them sorrow of heart, thy curse to them.

WEB: You will give them hardness of heart, your curse to them.

YLT: Thou givest to them a covered heart, Thy curse to them.
