Anesthetic
Something that causes its subject to be insensitive to pain
Cease
Stop
Envy
The longing for another person's stuff or qualities
Extinction
When someone/something ceases to exist
Heroine
A female hero; typically brave and admirable
Inevitably
Eventually
Insufferable
Not able to be endured
Shant
Shall not
Trivial
Something that is inconsequential; not that important