wane, wain

Wane or wane means to diminish or grow smaller--
When we notice the moon wane, we can see that it gets smaller every night.
You could see the old man's strength wane day by day.

Wain or wain ( rhymes with wane ) means a kind of cart or farm wagon--
"The Hay Wain" is one of his favorite paintings.
They loaded the wain with corn and headed for the barn.

Now that you know that, you can say--
"When they noticed the daylight wane, they hurried to finish loading the wain."

Note--not to be confused with "Wayne" ( rhymes with wane ), a man's given or first name--
We can't leave until Wayne gets here.
Wayne may also be a surname or last name, or the name of a place--
They just got back from Fort Wayne.