adjective
- not based on valid reasoning or good judgment; faulty or unreliable
- not physically strong, stable, or in good condition
- not mentally or emotionally healthy
Examples
- The lawyer’s argument was unsound and easily refuted.
- His financial advice proved to be completely unsound.
- The old bridge was declared unsound and closed to traffic.
- The building’s foundation was unsound after the earthquake.
- The committee rejected the proposal as economically unsound.
- She was declared mentally unsound and unfit to stand trial.
- The investment strategy seemed unsound from the beginning.