UNSOUND', adjective 1. Not sound; defective; as unsound timber. 2. Infirm; sickly; as unsound in health; an unsound constitution. 3. Not orthodox; defective; as unsound in faith; unsound doctrine. 4. Not sound in character; not honest; not faithful; not to be trusted; defective; deceitful. 5. Not true; not solid; not real; not substantial; as unsound pleasures; unsound delights. 6. Not close; not compact; as unsound cheese. 7. Not sincere; not faithful; as unsound love. 8. Not solid; not material. 9. Erroneous; wrong; deceitful; sophistical; as unsound arguments. 10. Not strong; as unsound ice. 11. Not fast; not calm; as unsound sleep. 12. Not well established; defective; questionable; as unsound credit.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI