The phrase "waning authority" is correct and usable in written English
It can be used to describe a decrease in power, influence, or control over time.
Example: "The government's waning authority has led to increased public dissent and protests."
Alternatives: "diminishing power" or "declining influence."
On the Palestinian side they include Hamas's refusal to recognise Israel explicitly, tension between Hamas's domestic and Damascus-based leaders, and its waning authority over other armed groups.
His statement, in effect declaring Brown unelectable, will further weaken the prime minister's waning authority and takes the challenge to his leadership to a dangerous level.
Certainly, many manifestations of a cultural renaissance were evident at the time: interest in preserving artifacts and literature of classical antiquity, the waning authority and influence of the church, the waxing humanism, the burgeoning of urban centres and universities, and the growing economic affluence of the states of western Europe.
The Tory leader accused the prime minister of being in denial about his waning authority at a highly-charged prime minster's question time just 90 minutes after Hazel Blears, the communities secretary, confirmed that she will resign from government in the impending reshuffle.
But Jim Lewis, director of the Center for Strategic and International Study's Commission on Cybersecurity for the 44th presidency, believes the cyber czar's waning authority was a factor.
In a minor boost to her waning authority at home, she won the vote without having to rely on opposition support.
The salutary benefit may be to buttress waning clerical authority, since indulgence practice rewards deference to clerical authority with the attractive albeit unverifiable promise of decreased punishment in the afterlife.
And with Thompson's authority waning as his exit approached.
McDonagh bills this as the second part of his "glorified suicide trilogy", although it might more readily be viewed as a rueful wake for the Catholic church, mired in scandal, its authority waning.
Mahmoud Ahmadinejad was chosen and supported unconditionally during the presidential elections of 2005 by a small core of clerical and military leaders who worried about the long-term consequences of Ayatollah Khamenei's waning appeal and authority during the 16 years of Rafsanjani and Khatami's presidencies.
First, David Cameron's authority is waning.
