'increasingly assured' is a correct and usable phrase in written English.
You can use it to describe someone who is becoming more and more confident in their actions and words. For example, "As the days passed, I became increasingly assured in my ability to perform the task."
But Ms Rousseff is looking increasingly assured.
His performances grew increasingly assured and explosively energetic.
Instead of falling within months, as Canada's liberal punditocracy had predicted, Mr Harper has become an increasingly assured performer.
Beneath that hoodie, these people say, is an increasingly assured leader, one tempered by failures — and there have been some big ones — as well as astonishing successes".
Signed from Empoli in the summer, the 21-year-old looks increasingly assured in such company and put in a solid performance here.
Rangers had endured a frustrating 90 minutes as Dundee became increasingly assured in their defensive play after their hosts failed to capitalise on a lively start.
At the same time, large commercial CSPs increasingly assure customers with sensitive data that their data will remain in particular countries or regional zones of choice, even for remote access.
As the increasingly more assured Robinson endowed his main man with subtler shadings, the Banks novels grew more intricate and ambitious, not to mention longer.
Keenan is assured, increasingly winning, and has one memorable, poignantly still moment – singing a melancholic Irish ballad.
Over the weeks, the Pentagon has assured increasingly angry senators that it was negotiating with the Red Cross, and then offered the rather absurd claim that it was still "collecting" the documents.
63 Given that a quantitatively adequate supply of protein is assured, increasingly more attention is dedicated to the ideal amount of single essential AA types.
