This post has a great exploration of that question! Also, funnily enough, if you hadn't seen user Mirkrahven's post, Bethesda posted this article just yesterday with the following quote from Emil Pagliarulo, one of the main designers of the language:

“You can’t really write a phrase on a wedding cake without including the word ‘love,’ right? Well, just like with Klingon, the Dragon language didn’t have a word for love!” Pagliarulo laughs. “So I had to create one.” That word is "Ros” (like rose) and the entire phrase Pagliarulo created was "may your love last forever.”

I'm not sure that a wedding cake inscription is the best attestation for a word, but I'll take it, lol