The phrase "ascendant power" is correct and usable in written English.
It can be used to describe a nation, entity, or force that is rising in influence or strength, often in a geopolitical context.
Example: "In the 21st century, China has emerged as an ascendant power on the global stage, challenging the dominance of traditional superpowers."
Alternatives: "rising power" or "emerging power".
Today, the ascendant power is China, which produces engineers at a torrid rate.
But persistent political problems and the frictions created by the military's ascendant power continue to gnaw at the country's stability.
As candidates also fielded questions about same-sex marriage and abortion, they pledged to remain attentive to the ascendant power of the Tea Party movement that caused ripples in Republican primaries last year.
The ascendant power of Ms. Warren and her fellow populists is best captured by their torpedoing this month of Lawrence H. Summers, Mr. Clinton's treasury secretary, who was blocked before President Obama could even nominate him to lead the Federal Reserve.
At a landmark meeting on April 16 in the Afghan capital, Kabul, top Pakistani officials suggested to Afghan leaders that they, too, needed to look to China, an ascendant power, rather than align themselves closely with the United States, according to Afghan officials.
For a brief period, in the early to mid-14th century, it was an ascendant power in the island of Sri Lanka when all regional kingdoms accepted subordination.
Mr. Thompson joins a company that is losing momentum against the ascendant powers in the consumer Internet business — Google and Facebook.
Unlike past ascendant powers, the United States carved out no colonies, nor even spheres of influence in the aftermath of its nemesis' collapse, despite all the silly talk of an American empire.
By the middle of the 16th century, however, the family had been replaced in the Kantō region by the newly ascendant feudal power of the Hōjō family.
They can be heard, too, in the furious response to Kaepernick's protest, in which athletes represent an ascendant black power that is ungrateful for the opportunities extended to them, and wrong for pointing out the obvious racial injustices that still exist in the country.
Then as now, newly ascendant world powers threaten to overtake our leads in education and scientific research.
