This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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v. To fail to satisfy the hope, desire, or expectation of.

v. To frustrate or thwart: "I will not disappoint the confidence you have put in me” ( Wayne A. Budd).

verb-intransitive. To cause disappointment.

v. To displease by e.g. underperforming

v. To defeat of expectation or hope; to hinder from the attainment of that which was expected, hoped, or desired; to balk

v. To frustrate; to fail; to hinder of result.

To frustrate the desire or expectation of; balk or thwart in regard to something intended, expected, or wished; defeat the aim or will of: as, do not disappoint us by staying away; to be disappointed in or of one's hopes, or about the weather.

To defeat the realization or fulfilment of; frustrate; balk; foil; thwart: as, to disappoint a man's hopes or plans.

To hinder of intended effect; frustrate; foil.

v. fail to meet the hopes or expectations of

""Inevitably, all presidents during their term disappoint some of their supporters," said Brian Frederick, a political science professor at Bridgewater State College."

satisfy   

disappointed    disappointing    disappoints   

queer    foil    bilk    scotch    spoil    thwart    frustrate    baffle    cross   

come short    disenchant    fail    disillusion    fall short    betray   

disappointment    disappointing    disappointed   

defeat    balk    foil    fail    tantalize    delude    frustrate    baffle    desert   

anoint    appoint    datapoint    disjoint    joint    point    pointe    reappoint   

frustrate    Embarrass    disconcert    unsatisfactory    disturb    distasteful    gratify    disastrous    annoy    inconvenient