disappointing
UK: ˌdɪsəˈpɔɪntɪŋ | US: ˌdɪsəˈpɔɪntɪŋ
adj. failing to meet expectations or hopes; unsatisfactory
vt. (present participle of "disappoint") causing someone to feel let down or unfulfilled
The word "disappointing" originates from the verb "disappoint," which combines the prefix "dis-" (indicating reversal or negation) and "appoint" (from Old French "apointer," meaning "to arrange" or "assign"). Historically, "disappoint" meant "to remove from office" but evolved to signify "to fail to fulfill expectations." The suffix "-ing" forms the present participle, turning it into an adjective describing something that causes disappointment.
The movie's ending was disappointing after such a strong start.
His performance in the exam was disappointing compared to his usual standards.
The weather forecast was disappointing for those planning a picnic.
She found the restaurant's service disappointing despite its high ratings.
The team's loss was disappointing for their loyal fans.