I can give you several sentences.
He took a mortal wound in the battle
The general suffered a mortal wound and died two days later. Every mortal will die eventually.
A word that starts with mortal is mortality.
Like this: You are a mortal, you can die. I, however, am immortal, in other words, I cannot die.
The prefix for the word "mortal" is "im-".
The sicker the old man became, the more he came to grips with being mortal like everyone else. The Olympus gods were constantly trying to control the actions of mortal men. The knight received a mortal wound in battle, but inspired his men to victory.
mortal = mortalis
Bella, the main character in Twilight, is MORTAL until Edward bites her.
David was not his mortal enemy, merely his foe. (this assumes that sentence is meant to be sentence)
The root word is mortal
Immortal.
Mortal