disappointing is a form of:

Disappoint



verb
1.
(TRANSITIVE) (To fail to do or be equal to what was hoped or desired or expected by, to frustrate (hopes etc)) ធ្វើឱ្យខូចចិត្ដ, ធ្វើឱ្យអស់សង្ឃឹម
Example: Sorry to disappoint you, Dis (with) my new house.
Example: I always seemed to disappoint my mother when she saw my report card.
2.
(បច្ចេកទេស) អស់សង្ឃឹម រារាំងមិនអោយកើតឡើង
1.
disillusion, dismay, dissatisfy, fail, frustrate, mislead