Fidelis ad Mortem: Latin for Faithful unto Death.

Erchomai: ancient Greek for "I am Coming".

Flectere si nequeo superos, Acheronta Movebo: Latin for If I cannot move Heaven, I will raise Hell.

Caelum Denique: Latin for Heaven at Last. It was the battle cry of the Crusaders

Beati Bellicosi:Latin for Blessed are the Warriers.

Ave Atque Vale: Latin for Hail & Fairwell. It was originally a poem by Catullus, but at some point it became what the Nephilim say during funerals, or when someone dies in battle

Ignis aurum probat: Latin for Fire tests Gold

In Hoc Signo Vinces: former motto of The Circle, it is Latin for "By this Sign We Will Conquer

Khalepa ta Kala: Greek for (1) that which is worth having- the good, fine, honorable & noble things- are difficult to attain. (2) beauty is harsh

Mea Culpa, Mea Maxima Culpa:Latin for my own fault, my most grievous fault

Mene mene tekel upharsin: from the Old Testament, it means the Writing on the Wall. It is a portent of doom- it means the end of an empire

Mizpah:a sort of good-bye without saying good-bye

Ouroboros: a serpent that has formed a circle by swallowing its own tail. A double ouroboros has two serpents swallowing each other's tail forming one circle. It symbolizes the end of the world, & the beginning

Parabatai: a pair of warrior Shadowhunters who are bonded together for life through a ceremony enacted with runes

Pulvis et umbra sumus: Latin for "We are dust & shadows.

Quis ut Deus: Latin for Who us like God?

Sic semper tyrannis: Latin for thus always to tyrants

Taceant Colloquia. Effugiat risus. Hic locus est ubi mors gaudet succurrer vitae: Latin for Let conversation stop. Let laughter cease. Here is the place where the dead delight to teach the living. It is written over the doors of the Ossuarium