soundness
1 antonym for soundness — opposites grouped by meaning.
Noun — The state of being healthy, solid, or in good condition.
Antonyms
unsoundness
Etymology
The word came into English via Middle English soundenes and soundnes, which developed from Old English *sundnes and *ġesundnes (found in onsundnes), in turn from Proto-West Germanic *sundnassī (“soundness, health”). It can be broken down as sound + -ness, and is cognate with West Frisian sûnens (“soundness, health”), M...
Full origin of soundness →