'Mortis' is from Latin , and means 'dead'. E.g. Rigor mortis. The stiffness a cadaver (dead person) acquires a few hours after dying.
Mortis Vorator is latin for death eater
Livor mortis is the settling of blood in the lowest portion of the body causing a purple color in the skin; "livor" is Latin for 'bluish color' and "mortis" is Latin for 'of death'
"In death" may be translated into Latin as in morte.
Mortis
Mors/Mortis
The latin root meaning for cise is to cut
The root "discipulus" means "student" in Latin.
Calor is the Latin word for "heat".
Bellator Mortis
That is the correct spelling for "rigor mortis" -- a Latin phrase applied to the stiffening of muscle tissues after death.
The root sequ means "to follow" or "to order." It is derived from the Latin word "sequi."