The word 'unopposed' is correct and usable in written English.
It can be used to refer to something that is not challenged or contested. For example, "The candidate was unopposed in the election, so he was automatically awarded the office."
The veteran leftwinger Hamdeen Sabbahi has become the first candidate to officially enter the race to succeed Mohamed Morsi as Egyptian president, ensuring that the army chief Abdel Fatah al-Sisi will not be elected unopposed.
Gurbanguly Berdymukhamedov, a former health minister and a trained dentist, emerged as Niyazov's successor, running unopposed in a presidential election in early 2007.
"I was elected by the Green party members and re-elected unopposed nine months ago to serve a two-year term," she said.
Mr Fong faced a powerful challenge for his party's nomination in June; Ms Boxer was to all intents and purposes unopposed.
The Conservatives were long divided into two fractious and weak parties, leaving the Liberals effectively unopposed.
Then, under a pitiless and unopposed German bombardment from the air, the shattered remnants of an Allied army, without stores, without food, without equipment, were rescued from Europe in tugs and trawlers and yachts and rowing boats, in any odd scratch vessel that could make the Channel crossing.
Don Siegelman, the Democratic lieutenant-governor, a veteran in politics, is virtually unopposed in his party.
Last year it blocked Sudan's candidacy, but Syria was the unopposed choice of the 50-country Asian group.Investigations into a 1999 multi-billion dollar arms deal in South Africa were broadened.
The publishers who settled with the DoJ have also agreed to a $69m e-book pricing settlement with the states, to take effect after a hearing in February 2013.If Apple and MacMillan lose their case with the DoJ, then Amazon will re-emerge as an unopposed retailer of low-cost e-books.
Frederick the Great mainly spoke and wrote in French.The second world war stripped Germany of its cultural defences, allowing English to infiltrate unopposed.
His men drove into the city virtually unopposed, and swiftly seized the airport and presidential palace.
