Invidium

Will Herondale, driven mad with longing for Tessa Gray, cannot endure his feelings for her without running the risk of putting her in danger. He finds a temporary solution: a hatred potion, one that causes him to absolutely loathe Tessa.

The members of the Institute quickly dwindle down to Will and Tessa. When Mortmain places an imprisoning curse on the Institute, the two find themselves trapped with only each other for company. Their freedom is scheduled for the end of the year. But until then, Will and Tessa must find a way to undergo the coming months without killing each other.

When they're driven to near insanity from their isolation, Will and Tessa both come to realize that hatred is not all that different from love.

❝ invidia, invidiae [f.] /inˈvidja/ noun: to envy/spite· to hate. ❞