This is the 5832nd most frequent Korean word.
부족해
"Not enough" or "lacking."
The word '부족해' is used to describe a lack or insufficiency in the context of experience.
그는 경험이 부족해 보인다.
He seems to lack experience.
Here, '부족해' indicates that the amount of class materials is not adequate or enough.
수업 자료가 조금 부족해요.
The class materials are a bit insufficient.
In this sentence, '부족해' describes a personal insufficiency, specifically in the context of physical stamina.