'unhinge' is a correct and usable word in written English.
You can use it to describe a process of unsettling someone's mental or emotional equilibrium, or as a verb to describe to cause someone to become unbalanced or disturbed. Example: The sudden news completely unhinged him, and he was unable to think clearly for some time.
Any hint from economic indicators of such a dip is likely to unhinge shares, and to take the current high hopes with them.
In 1996 Israel experienced a change of government and a change of policy that threatened to unhinge the already shaky Middle East peace process.
She threatens the doorkeeper: "If thou openest not that I may enter I will smash the doorpost and unhinge the gate.
Yet the courage and resolution shown yesterday will have made them many friends and by August those qualities seem certain to be on display in the Football League, as long as fixture congestion does not unhinge their season.
Not only did Suarez unhinge the England defence; his decision to bring Nicolas Lodeiro and Alvaro Gonzalez into his midfield also paid off.
He could captivate an audience with stirring oratory and unhinge his opponents with a cold, discerning eye.
Chef's Salad A mix of seasonal greens and vegetables, cut into pieces small enough that they fit comfortably into your mouth without forcing you to unhinge your jaw in public.
They were designed to undermine our spirit, unhinge our reason, and fog our vision.
The doubts that are arising about both the intentions & the political efficacy of the Thieu regime could prove more important than all the complicated machinery of Vietnamization, & their consequences could unhinge Nixon's whole scheme.
Then, You've got man, who is smart and can speak but who can't fly, breathe underwater, or unhinge his jaws to swallow large prey in one gulp.
The terrorist attacks of September 11th seemed to unhinge him, as they did many people, moving him to call domestic critics of the Bush Administration's response a potential "fifth column".
