This is the 10256th most frequent Korean word.
교과서
"교과서" means "textbook."
교과서 refers to a textbook used as a primary tool for learning educational content.
정철수는 교과서를 공부하는 데 사용합니다.
Jeong Cheolsu uses the textbook for studying.
교과서 here indicates a source of standard information used for educational reference.
그는 교과서를 참고하여 과제를 완성했습니다.
He completed the assignment by referring to the textbook.
교과서적인 figuratively describes an orthodox or standard method frequently associated with textbook-like methods.