旧 (old times, old things, old friend, former, ex-)

旧友きゅうゆうに招待しょうたいされた。

I was invited by an old friend.

帰省きせいの折おり旧友きゅうゆうに会あった

When I came home, I met an old friend.

旧式きゅうしきの電話でんわを久ひさしぶりに見みた

I saw an old-fashioned telephone for the first time in a long time.