Vocabulary
실망시키다
to disappoint someone
Meaning
실망시키다 — to disappoint someone
Why this form?
실망하다 — be disappointed: describes the disappointed person’s state; 실망시키다 means causing someone else’s disappointment.
Forms not to confuse
실망하다
결과에 실망했어요. — I was disappointed with the result.
Examples
넌 계속 나만 실망시킨다. — You just keep disappointing me.
부모님을 실망시키고 싶지 않아요. — I don't want to disappoint my parents.