EMBITTER = 1. to make bitter. 2. arouse bitter feelings in; cause to feel resentful or gloomy.
Main Example
Several of the victims' relatives were deeply disappointed when Washington D.C. area sniper Lee Boyd Malvo did not receive the death penalty. Said the embittered brother of one of the victims: "Even now we go through the pain and suffering every day. I'm not at all happy about this whole thing."
Workplace Examples
Are you surprised at Steve's indifference? Well, you shouldn't be. Imagine how he must be feeling, having to now report to his former subordinate? He must be one deeply embittered guy!
I don't think he will ever run for political office again. The amount of character assassination he endured . . . he is totally embittered by that experience.
Other Examples
your saying: "I don't like this plan--it's too radical! Just about every employee will lose salary or status, if not both. No, it will embitter the entire work force."
somebody who is embittered because his years of hard work have gone unrewarded; a couple embittered over losing their home to foreclosure
the collapse of Enron and WorldCom, resulting from fraud by top executives, embittering tens of thousands of employees and investors alike
employees nationwide beginning to express their embitterment at the growing gap between average CEO salary and what the typical worker earns