This is the 3813th most frequent Korean word.
식이다
"식이다" means "to cool down" or "to let cool."
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.
그의 행동은 어린아이의 식이다.
His behavior is like that of a child.
식이다 is used here to describe a way or method of addressing an issue.