Vocabulary
당연하다
be natural, only to be expected
Meaning
당연하다 — An adjective used when a situation is considered normal, obvious, or expected.
Why this form?
물론이다 (“of course”) often affirms an answer; 당연하다 describes what is natural or expected.
Examples
무서운 게 당연해요. — It is only natural to be scared.
그렇게 느끼는 건 당연해요. — It is natural to feel that way.