古くなった

has gotten old

→ 古い
phrase Rare #45,832
has gotten old Describes something that has become old or worn with time.
JA: この建物は古くなった。
EN: This building has gotten old.

最後に、地元図書館が本当に古くなった本を処分する。

Finally, the local library gets rid of books that are truly worn out.

建物が古くなった。

The building has gotten old.