I. shə-ˈgrin noun
Etymology: French, from chagrin sad
Date: circa 1681
: disquietude or distress of mind caused by humiliation, disappointment, or failure
II. transitive verb
( cha·grined -ˈgrind ; cha·grin·ing -ˈgri-niŋ)
Date: 1733
: to vex or unsettle by disappointing or humiliating
he was chagrin ed to learn that his help was not needed