Vocabulary
놀라다
be startled, surprised
Meaning
놀라다 : be startled, surprised. React to something unexpected; 놀란 is the past noun-modifying form.
Why this form?
무섭다 — “be afraid” is a fear state, not necessarily a sudden startle.
Useful forms
놀란 = 놀라- + -ㄴ, noun-modifying form describing someone startled.
Forms not to confuse
무섭다
혼자 있으면 무서워요. — I'm scared when I'm alone.
Examples
아직 많이 놀란 상태입니다. — He is still quite shaken.
갑자기 놀라서 소리를 질렀어요. — He shouted in surprise.