H6864–צֹר–tsor

Then Zipporah took a sharp stone, and cut off the foreskin of her son, and cast it at his feet, and said, Surely a bloody husband art thou to me.

צֹ֗ר Tzor “a flint”

As an adamant harder than flint have I made thy forehead: fear them not, neither be dismayed at their looks, though they be a rebellious house.

מִצֹּ֖ר (צֹּ֖ר) Tzor “flint”