sanctity

Sanctity comes from Latin sanctitas, meaning holiness, sacred character, or moral purity. That noun was formed from sanctus, the past participle of sancire, a verb meaning to make inviolable, ratify, or establish by sacred act. In early Roman life, this was legal and religious language at once. A thing made sanctus was protected because it had been set apart.

By the first century BCE and after, sanctitas named the condition that followed from such consecration. It could refer to holiness in religion and to uprightness in conduct. Christian Latin gave the word a more intense devotional life. By late antiquity, it had become a key term for holiness and saintly character.

Old French transmitted the form as saintete and related learned variants, while English also drew directly from Latin patterns. By the late Middle English period, sanctity had become the settled learned form. It was used for sacredness, saintliness, and the inviolable status of holy things. The legal edge of the Roman verb still faintly remained.

Modern sanctity keeps both moral and sacred senses. One may speak of the sanctity of life, marriage, an oath, or a holy place. The word often marks what is not to be violated. Its force lies in separation joined to reverence.