The word "unsound" means something that is not healthy, strong, or well-functioning. It can also describe an idea or argument that is not logical or based on valid reasoning. Full definition
Without any motivation or target, students can not achieve anything and it is the more unsound practice of education. (essayschief.com)
Moreover, if a seller knows that a latent defect exists (such as unsound construction, mold, infestations, or environmental damage), the seller has a duty to disclose the latent defect to the buyer, or else face potential damages for remediation. (gilbertsondavis.com)
As with any corporation, the pursuit of these goals taken to the extreme can result in unsound policies. (atlanta-injury-attorney-blog.com)