What is the purpose of adding 子 in this sentence?


娘がなかなか起きない。よく寝る子だ。 It means my daughter has a hard time waking up. She sleeps
a lot. but I can't figure out the purpose of adding 子.




よく寝る is a relative clause, which modifies noun 子.

So whole "よく寝る子だ。" means "(She) is a child, who sleeps well/often."




よく寝る is a relative clause, which modifies noun 子.

So whole "よく寝る子だ。" means "(She) is a child, who sleeps well/often."

