Sanctify [give a good impression about] G-d [and his Torah

sanctification of the divine name; martyrdom.

Sanctification of G-d's Name.

lit. sanctification of the Name: selfless act, glorious deed. opposite of chillul Hashem

Kiddush hashem (Hebrew: קידוש השם; "sanctification of the name of God") is a precept of Judaism as expressed in the Torah for any Jew to: "To sanctify His Name" , and conversely not to bring dishonor or shame to God's name which is known as Chillul Hashem: "Not to profane His Name" . Thus any action by a Jew that brings honor, respect, and glory to God is considered to be a Kiddush Hashem, whereas any behavior or action that disgraces, harms or shames God and his Torah is regarded as a Chillul Hashem which means a "desecration of God".