student asking question

What's "less-than-sound" mean?

teacher

Native speaker’s answer

Rebecca

In this context, "sound" means reliable, effective, good, or thorough. When we add "less-than" before it, it means "not sound," or "unsound" - meaning unreliable or poor. Ex: That doesn't sound like a very sound proposal. Ex: The building will be torn down due to the unsound foundation below.

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