
Unsound
Physical Safety
Use 'unsound' to describe things that could collapse or break, posing danger.

Walking on the unsound ice is risky.
Avoid for People
'Unsound' is rarely used for people unless discussing their plans or ideas.

He has unsound plans for the business.
Serious Concern
Describing something as 'unsound' implies a serious issue, not just a small defect.

They condemned the unsound structure after the earthquake.
Compare with
DefectiveDubiousFlawImpairPerilousReliableStableValid
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