What specific emotion would best describe dukkah?

One of my key problems studying Buddhism has been definitions. My definition often doesn't have the same span as that of the typical Buddhist - but I am usually successful in coming to similar conclusions. I try to focus on some generalities of the word in question and get an emotional feel. Which brings me to the problem with dukkah. I am not sure what word(s) properly conveys (in english) the emotion sought to be elicited by the concept of dukkah. And the terms we HAVE come to use in its' description to date are rather, uh, dukkah. I see it as frustration. You keep trying to satisfy a permanent hunger with an impermanent response. But I am told that is also not a complete comparison. For example ... seething in anger borne from frustration is a different type of anger than that coming from a reaction to an insult. Or is it? Was it a generalized word they flippantly threw around? Or did it intend to evoke a specific type of emotional response?