Take the word Wei in the dictionary, which means

Wei Wei

1. The rope that binds things: ground ~ absolute (absolute: broken). Important and key thing: the law is the outline.

1. system, link: ~ system.

3. keep, preserve and protect: ~ hold. ~ protection.

4. Classical Chinese auxiliary words: You ~ Emperor. ~ (only) wonderful ~ (only) Xiao.

5. Pass "only". Thinking: ~ eternal peace.

[Uyghur] One of the ethnic minorities in China.

I think what Ivy means is probably! The only thing that can keep love eternal.

This article is a non-professional answer!