based on faulty ideasThe thinking is muddled and fundamentally unsound.
The tests were seriously flawed.
Their interpretation was faulty.
She was a false friend, envious of her lifestyle and her success.
We knew we may have to charge them on shaky evidence.
The figures were unreliable because the sample sizes were too small.
Those arguments are rendered invalid by the hard facts.
Retailers can return defective merchandise.
his completely illogical arguments
The conclusions they have come to are completely erroneous.
The Duke was not convinced by such specious arguments.
Their argument is fallacious.
not firmThe church was structurally unsound.
a house built on unstable foundations
Our house will remain on shaky foundations unless the architect sorts out the basement.
low-paid, insecure jobs
Critics claim the trucks are unsafe.
She had proved to be an unreliable witness and had lied to police.
a flimsy wooden door
I was sitting on a wobbly plastic chair.
She climbed the rickety wooden stairway.
a slightly unsteady item of furniture
unhealthy or unstableHe was rejected as an army conscript as being of unsound mind.
a poorly dressed, unhealthy looking fellow with a poor complexion
He was shown to be mentally unbalanced.
Clear away dead or diseased plants.
He was seriously ill with pneumonia.
The animals escaped through a weak spot in the fence.
He was a physically delicate child.
A rise in overseas sales is good news for the ailing economy.
The frail craft rocked as he clambered in.
He felt unwell as he was being driven back to his office.
a deranged and motiveless rampage
a frantically unhinged guitar solo
in poor health
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in the sense of ailing
unwell or unsuccessful over a long periodA rise in overseas sales is good news for the ailing economy.
in the sense of defective
imperfect or faultyRetailers can return defective merchandise.
unsound 的词库—— 柯林斯 英语词库
Life on the edge