선생님
seonsaengnim · TOPIK 1
teacher (honorific)
🍎 先生 = earlier (선) + born (생), plus 님, the honorific suffix
A teacher is literally one born before you, so they know more. Same hanja as Chinese xiānsheng and Japanese sensei. 님 adds respect, as in 부모님 (parents) or 손님 (guest).