The phrase "a rather shaky" is correct and usable in written English.
It can be used to describe something that is unstable, uncertain, or not firmly established.
Example: "The project's future is a rather shaky proposition given the current funding issues."
Alternatives: "somewhat unstable" or "fairly uncertain".
McDonnell, like Allen, seems to have a rather shaky grasp of the principles of intellectual inquiry.
The firm of Khrushchev & Bulganin had been in business only a few months and was believed to be in a rather shaky position.
They took the play to Atlanta's half of the field and applied a great deal of pressure to a rather shaky Beat defense.
Howard Dean won on a technicality when he entertained supporters at a campaign rally with a rather shaky rendition of their 2001 hit 'Ms Jackson'.
Given that many projects have been financed by sales of government-owned land and with loans from government-controlled banks that are routinely rolled over rather than repaid, China's infrastructure sits on a rather shaky economic foundation.
The American mortgage industry was rotten from top to bottom, from buyers lying about their incomes to qualify for loans, through brokers accepting buyers with poor credit histories, to investors who bought bonds in the secondary market without conducting enough research.Nevertheless, the agencies' business is built upon a rather shaky tripod.
They climbed to their room on a set of "rather shaky and ladder-like" stairs.
The "march of the makers" and "we are all in this together" sound like slogans on wartime posters by Fougasse (one imagines nicely drawn soldiers marching with spanners clasped to their chests), and while the first might be no more than a pretty thought in a post-industrial world, the second, as Ferdinand Mount writes, sounds "grotesquely implausible … an impudent and rather shaky assertion".
Presently, however, he began to have misgivings, for he realized that his own judgment in such matters was still rather shaky, so he consulted a friendly boo dealer, who sent him to Miss Benjamin.
When it comes to the moment [to defect] they get rather shaky, they try to find a way to avoid it happening".
In spite of its rather shaky attitude to racial diversity, Midsomer Murders is a sneaky favourite of mine.
