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

其他同义词

in the sense of ailing
Definition
unwell or unsuccessful over a long period
A rise in overseas sales is good news for the ailing economy.
in the sense of defective
Definition
imperfect or faulty
Retailers can return defective merchandise.
同义词
not working,
on the blink (slang),
buggy
in the sense of delicate
He was a physically delicate child.
同义词
debilitated,
in poor health,

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unsound 的词库—— 柯林斯 英语词库
Life on the edge
The desire to push the boundaries has been a motivator in many a daring expedition, testing the human spirit and physical abilities to the utmost. Indulge your adventurous spirit by exploring some associated ‘extreme’ vocabulary. Will you have the survival skills to master our quiz?
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