This is the 11402nd most frequent Korean word.
까닭은
"까닭은" means "the reason is" or "the cause is."
'까닭은' is used to mean 'the reason is' introducing the reason in detail.
그 대회에서 우승하지 못한 까닭은 준비가 부족했기 때문이에요.
The reason I could not win the competition is due to the lack of preparation.
'까닭은' indicates the cause or justification for a given situation.
그의 동작이 느렸던 까닭은 체력이 고갈되었기 때문이었죠.
The reason his movements were slow was because he was out of energy.
'까닭은' clarifies why a particular emotional state exists, providing causation.