The phrase "rendered unworkable" is correct and usable in written English.
You can use this phrase to indicate that something has been made inoperable or dysfunctional in some way. For example, "The disagreement between the two countries rendered the treaty unworkable."
Thus, the balance-of-power system was rendered unworkable.
If Kennedy's vote is lost, the Obama administration's signature domestic legislative achievement will be rendered unworkable or struck down entirely.
This settlement was soon rendered unworkable by the more intransigent barons and John's almost immediate appeal to Pope Innocent against it.
In Greece, Hellenic Petroleum, the country's leading refiner, also suspended purchases of Iranian crude oil — not because of the impending European Union embargo, but because banking payments to Iran have been rendered unworkable by the financial sanctions already in place, Reuters reported.
At some crucial point in your hangover your evening splays itself in front of you like a Prodigy video as you fit, lavishly, into stasis, rendered unworkable by the reality of The Shit You Do When You Are Drunk.
Conversely, religious pacifists cannot refrain from paying taxes because taxes fund the military; such an exemption would burden society in that it would render taxation unworkable.
Bush administration officials argued that such a change would have rendered the commissions unworkable.
The majority ruling rejected arguments that the publication of the names both on social media and in foreign press rendered the injunction unworkable.
The ISPs, meanwhile, are claiming that privacy concerns and technological roadblocks will render such legislation unworkable.
The clubs want to hold the draft on or around Dec. 15, but legal challenges will very likely render that timetable unworkable.
At the same time, the French are understandably uneasy that their approach may ultimately render the country unworkable and its customary standard of living unsustainable.
