unsound

a. 腐烂变质的,谬误的

He must be of unsound mind to pay so much for a house that is practically falling down.

他一定疯了，竟然花那么多钱去购买一幢实际上快要倒塌的房子。

Buyer state cargo unsound condition and prepare claim is await result of our counter survey.

买方说货物质量不高，准备提出索赔，并在等待我们提邮的相对检验结果。