descriptive · thoughtful or full of longing and anxiety

每当听到这首老歌，他心中总会产生悠悠的思念。

descriptive · absurd, groundless, or unfounded

这完全是悠悠之谈，不足为信。

descriptive · lasting for ages, long drawn out, or remote in time or space

悠悠岁月，承载着无数的回忆。

descriptive · leisurely and slow in movement or manner

白云在蓝天中悠悠地飘荡。