Dishonorable
Part of speech: adjective
Definition: Without honor, or causing dishonor Lacking respect or ethical principles
Example sentence: After the situation with Kursk submarine, I started looking at Mr. Berezovsky in a completely different way. For me, it was a turning point in our relationship. I think that he took a completely dishonorable position.
Obscure
Part of speech: verb
Definition: To darken, make faint etc.To hide, put out of sight etc.
Part of speech: adjective
Definition: Dark, faint or indistinct.Hidden, out of sight or inconspicuous,Difficult to understand.
Example sentence: A Constitution should be short and obscure.