수학이 · 수학을
math, mathematics
Example
수학 문제가 너무 어려워서 못 풀었어요.
The math problem was too hard, so I couldn't solve it.
Word parts
수 number+학 study
Literally 'number study'. -학 = field of study: 수학, 과학, 경제학.
Good to know
Don't confuse with 수학여행 'school field trip'; that 수학 means 'cultivating learning', a different Sino-Korean word.
Related words