What to write for a congratulations note in a wedding card

Looking to write something unique in a wedding card? Congratulations. Congratulations. Congratulations. You see it so often. But what does it really mean? At work a card was being passed around for a former coworker who is getting married. "Congratulations" appeared many times in people's wishes, so I looked it up on etymonline.com:

Congratulations
mid-15c., from L. congratulationem (nom. congratulatio), noun of action from pp. stem of congratulari "wish joy," from com- "together, with" (see com-) +gratulari "give thanks, show joy," from gratus "agreeable"

It's wonderful what "congratulations" means. Here's what I wrote in the wedding card:

Congratulations in the truest meaning of the word.
* Con/com- means "with, together"
* gratulair means "give thanks, show joy"
I know with both of you together much joy and thanks will be shown in your marriage.

Feel free to use it in your wedding cards.