Date: August 06, 1996
You are right, of course. The Klingon word for "growl" isn't in the
dictionary. Likewise "jealous." That doesn't mean that these words don't
exist -- we just haven't learned them yet. In the meantime, I think the best
approach is to follow the advice of d'Armond Speers (in his response to your
note) and use what we do know in creative ways.
Let us know what you come up with!
PS -- The Klingon word for "smile" is mon. This also means things like
"snarl" and "smirk." I wouldn't be surprised to find a Klingon mon and growl
at the same time, but mon by itself doesn't describe the full growling