a.[Z]

1. 不健康的；不健全的；有病的
   She is psychologically unsound.

   她心理上不健全。

2. 腐烂的
3. 不稳固的；不安全的
   That bridge looks unsound to me.

   以我看那桥不安全。

4. 谬误的；无根据的
   Don't listen to unsound advice.

   别去听无根据的劝告。

5. 资金不雄厚的；经济上靠不住的
   I am afraid that it is an unsound investment.

   我担心这项投资靠不住。

adj.

1. not safe or robust; in poor condition.
   ▸not healthy or well.
2. not based on sound evidence or reasoning; unreliable or unacceptable.
   ▸not holding acceptable views.