UNSOUND
- Injured, ill, or diseased, esp. (of a horse) lame
- not sound [adj UNSOUNDER, UNSOUNDEST]
- not sound (being in good health or condition) [adj UNSOUNDER, UNSOUNDEST]
- Not safe or robust; in poor condition
- Not based on sound evidence or reasoning and therefore unreliable or unacceptable
- (of a person) Not competent, reliable, or holding acceptable views