This is something I was wondering since when you hover over it it presents you with other symbols.... so how should one verbally pronounce this?
Just click on the speaker symbol at the top (next to the translation).
I think it is 'ooe', but I don't know if it's the correct way to write that sound.
上 points up.
下 points down.
That's the origin of these two Kanjis. :)
Up, up, and....
Ok that's clever!
Easy if you learnt Chinese