UNSOUND


Meaning of UNSOUND in English

un ‧ sound /ˌʌnˈsaʊnd◂/ BrE AmE adjective

1 . not based on facts or good reasons

ideologically/scientifically/ecologically etc unsound

a test that’s scientifically unsound

2 . an unsound building or structure is in bad condition:

The houses are structurally unsound.

3 . formal physically or mentally ill:

people of unsound mind (=people who are mentally ill)

Longman Dictionary of Contemporary English.      Longman - Словарь современного английского языка.