The phrase "least assured" is grammatically correct and can be used in written English.
It is typically used to indicate something or someone that is not completely convinced or confident about something. Example: "The actress seemed least assured during her performance, stumbling over her lines and appearing uneasy on stage."
Labour candidates are at least assured of having their deposits paid for them.
WHEN TO WATCH The vault is perhaps the least assured of Biles's quest for five golds.
Mr. Frimbo said the "Dayliner" at least assured him that inland cruising was not at a total end.
There is a question of whether Pittsburgh should have had its players in the lane in the first place because they had already tied the score and at least assured overtime.
Viewers put out by the off-screen election between series two and three – and there were more than a few who questioned that decision – are at least assured of a good dose of high-stakes politics here.
Here the central character is a Pyongyang police officer, the likeable Inspector O, who knows that in North Korea mysteries are never solved, just absorbed into larger mysteries.The first in the series, "A Corpse In The Koryo", which came out in 2006, is the least assured, but in some ways the most original.
Martin closed with a 77 and finished at 427 in a tie for 57th, at least assuring him of full status on the Nationwide Tour next year.
When House members go home for their extended Thanksgiving break they can at least assure anxious constituents that they're trying to make joblessness less devastating.
But they argue that if Mr. McCain wins the popular vote -- especially finishing ahead of Al Gore and Bill Bradley -- that would at least assure him bragging rights for another week.
In lieu of amnesty, they reasoned, his presence might at least assure the inmates that the state would honor any agreement it made with them and prevent any reprisals should they end their protest.
Nevertheless, American officials and their negotiating partners feel that the newest statements will at least assure angry Arabs, in the long diplomatic tradition of statements contradicting each other while claiming they do not.
