His flaring up again means that he is immersing himself in that hobby again.

His passion for the game flared up again.

They conducted a secondary burial for their grandfather.

We are considering the resale of this product.

He visited the used bookstore to resell old books.

This tree needs replanting.

We need to replant this tree.

He was studying all day.

He tried to solve the problem all day long.

Today is my birthday.