The phrase "a certain uneasiness" is correct and usable in written English.
It can be used to describe a vague or unspecified feeling of discomfort or anxiety about a situation.
Example: "As the meeting progressed, I felt a certain uneasiness about the decisions being made."
Alternatives: "a vague discomfort" or "an unspecified anxiety".
Yet a certain uneasiness remains even among those who have come out of hiding.
She studied Gould's face with affection and amusement and also with what seemed to me to be a certain uneasiness.
But once that feeling passes you find yourself succumbing to a certain uneasiness about your own life, brought to the surface by Letts's revelations.
If, for example, the country had a young president and he had a Bay of Pigs, there would be a certain uneasiness. . . .
Mr. Patterson said even he had a "certain uneasiness," adding "that everything about AOL Time Warner is content, they need content, but they are selling content".
But when Shiels slid in to reach and then slice wide Riordan's low cross from the left, a certain uneasiness would invade the home team's supporters.
If he becomes too noisy and I rebuke him for it, he continues to sing but does it more privately and with a certain awe and uneasiness".
However, the idea of forming an alliance with the Khmer Rouge initially caused a certain degree of uneasiness within the leadership circles of the FUNCINPEC and the KPNLF, because both groups were leery about joining with a communist organization well known for its brutality.
Beyond uneasiness with the concept of rankings, students harbour a certain suspicion towards their volatility.
Hume allows that, speaking imprecisely, we often say a passion is unreasonable because it arises in response to a mistaken judgment or opinion, either that something (a source of pleasure or uneasiness) exists, or that it may be obtained or avoided by a certain means.
Overall this may reflect a certain lack of maturity of both these concepts in terms of established semantic standards, and may also suggest uneasiness about their measurability and direct implementation.
