This is the 18975th most frequent Korean word.
쓰이지
"쓰이지" means "is used" or "is written" depending on context.
The word '쓰이지' here is used in the passive form to indicate the act of being used.
이 연필은 자주 쓰이지 않아요.
This pencil is not used often.
'쓰이지' in this sentence is illustrating the inaction or rarity of being used for the word in discussion.
그 단어는 가끔 쓰이지도 않습니다.
That word is not even sometimes used.
Here, '쓰이지' implies an inactive state of utilization regarding the notebook.