효자가 · 효자를
a devoted son, a dutiful son
Example
민수는 부모님께 매일 전화하는 효자예요.
Minsu is a devoted son who calls his parents every day.
Word parts
효 filial piety+자 son, child
Literally 'filial son'.
Good to know
Also used for products: 효자 상품 means a best-selling item that brings in lots of money.
Related words