자식이 · 자식을
one's children, offspring
Example
부모님은 자식이 몇 살이 되어도 걱정하세요.
Parents worry about their children no matter how old they get.
Word parts
자 child+식 offspring
Literally 'child and offspring'.
Good to know
Careful: 이 자식 or 저 자식 is an insult like 'this jerk'; for others' kids, say 자녀.
Related words