Quote Originally Posted by Throbert McGee View Post
If I'm not mistaken, раздражать/раздразить can also mean "to cause physical irritation" (for example, if you get a skin-rash from itchy woolen sweaters).
Yes, it can mean that. But remember that we talk about the reflexive forms.

Quote Originally Posted by Throbert McGee View Post
And a question for native Russians: what about the verbs досадовать or досадить -- can they be used here?
No, because although these verbs can be reflexive (досадоваться, досадиться), they sound awkward and archaic. We don't use them in this way in modern Russian.