unsound

Từ điển Oxford Advanced Learner 8th

un·sound [unsound unsoundness] BrE [ˌʌnˈsaʊnd] NAmE [ˌʌnˈsaʊnd] adjective
1. not acceptable; not holding acceptable views
•ideologically unsound
•The use of disposable products is considered ecologically unsound.
2. containing mistakes; that you cannot rely on
Syn: ↑unreliable
•The methods used were unsound.
3. (of a building, etc.)in poor condition; weak and likely to fall down
•The roof is structurally unsound.
Opp: ↑sound
Idiom: ↑of unsound mind
Derived Word: ↑unsoundness

• Từ đồng nghĩa / Synonyms:
  bad, unfit, mentally ill, unstable, fallacious