This is the 8215th most frequent Chinese word.
gaku
"Gaku" is not a Chinese word; it is Japanese, meaning "study" or "learning."
Here, '学习' (xuéxí) means 'study,' and '大学' (dàxué) means 'university.' The character '学' refers to learning or studying, which forms part of '大学.'
我喜欢在大学学习。
I like studying at the university.
In this sentence, '学科' (xuékē) translates to 'subject' or 'discipline,' with '学' indicating a field of study.
他的成绩在学科中是最高的。
His grades are the highest in the subject.
Here, '学习' (xuéxí) comes in again, explicitly meaning 'learning,' and fits in the context of acquiring knowledge or skills.