Not whole, not solid, defective. / (especially of equestrianism) Infirm, diseased. / (UK, especially of people) Not good, unreliable.

The state of being unsound.

comparative form of unsound: more unsound

unfathomed

Impossible to sound; whose depth cannot be gauged.

plural of unsoundness

(poetic) Not making a sound; silent.

In an unsound manner.

superlative form of unsound: most unsound