1.
Something that is ~ is dirty and likely to cause disease.
...the Western attitude to insects as being dirty and ~...
By bathing in ~ water, they expose themselves to contamination.
= dirty
? clean
ADJ
2.
If you describe someone or something as ~, you consider them to be spiritually or morally bad.
They felt as though they had done something discreditable and ~.
...~ thoughts.
ADJ