dis·ap·point (dĭs'ə-point') v.
dis·ap·point·ed, dis·ap·point·ing, dis·ap·points
v.
tr.
To fail to satisfy the hope, desire, or expectation of.
To frustrate or thwart: "I will not disappoint the confidence you have put in me"(Wayne A. Budd).
v.
intr. To cause disappointment.
[Middle English disappointen, from Old French desapointier, to remove from office : des-, dis- + apointer, apointier, to appoint; see appoint.]
dis·ap·point·ing (dĭs'ə-poin'tĭng) adj. Not up to expectations or hopes: a disappointing test score; finished the marathon in a disappointing 12th place. dis'ap·point'ing·ly adv.
1434, from M.Fr. desappointer "undo the appointment, remove from office," from des- "dis" + appointer "appoint." Modern sense of "to frustrate expectations" (1494) is from secondary meaning of "fail to keep an appointment."