This is the 115th most frequent Korean word.
과
The Korean word "과" can mean "and" (as a particle), "subject/department" (as a noun), or "lesson/chapter" (as in study material), depending on context.
In this sentence, '과' is used as a conjunctive particle similar to 'and' in English, connecting two nouns.
나는 과일과 채소를 먹는 것을 좋아해요.
I like eating fruits and vegetables.
'과' appears in '수학 과학' to designate 'and' between two school subjects.
수학 과학 모두 열심히 공부합니다.
I study Math and Science diligently.
Here '과'(with its alternative form '와') is used to connect and compare two related entities.