없던

없던

"없던" means "that did not exist" or "that was not there."

In this sentence, '없던' is used to describe a 'cold' that previously did not exist or was absent yesterday.

어제는 없던 감기가 오늘은 생겼습니다.

The cold that wasn't there yesterday appeared today.

Here, '없던' describes a book which was previously absent from the table.

식탁 위에 없던 책이 누군가에 의해 놓였어요.

The book that wasn't on the table was placed there by someone.

In this context, '없던' refers to a problem that did not exist earlier but has now appeared.

갑자기 없던 문제가 생겼습니다.

Suddenly, an issue that did not previously exist arose.