This is the 3813th most frequent Korean word.
식이다
"식이다" means "to cool down" or "to let cool."
식이다 is used here to describe a way or method of addressing an issue.
문제를 해결하는 데에는 식이다.
It is a method to solve the problem.
식이다 is used here to indicate conformity to a particular style or method.
이 방법은 요즘 시대의 식이다.
This method conforms to the current era's style.
식이다 is used here to compare the behavior to a characteristic style or property.