chagrin:
noun:
- acute vexation, annoyance, or embarrassment, arising from disappointment or failure
transitive verb:
- to unsettle or vex by disappointment or humiliation; to mortify
Example: Chagrined to find that her current boyfriend has become best pals with her ex-boyfriend Hank, she goes to her ex with the problem. [Reference: Stephen J. Dubner, "Boston Rockers", New York Times , July 26, 1998]
