形容词
1. 无根据的;似是而非的；谬误的
If a conclusion or method is unsound, it is based on ideas that are wrong.
2. 不可靠的；不安全的
If something or someone is unsound, they are unreliable.
3. 有危害的
If you say that something is unsound in some way, you mean that it is damaging in that way or to the thing mentioned.
4. 不坚实的；不稳固的
If a building or other structure is unsound, it is in poor condition and is likely to collapse.
1. of e.g. advice
2. physically unsound or diseased
e.g. has a bad back
a bad heart
bad teeth
an unsound limb
unsound teeth
3. suffering from severe mental illness
e.g. of unsound mind
Synonym: mentally illunstable
4. not sound financially
e.g. unsound banking practices
5. not in good condition
damaged or decayed
e.g. an unsound foundation
6. containing or based on a fallacy
e.g. fallacious reasoning
an unsound argument
Synonym: fallacious