jatlh SuStel: *-wI'* has the effect of nominalizing the verb into the subject of that verb. A *vutwI'* is the thing that performs *vut,* the subject of *vut.* If you were to say **vutlu'wI',* you'd be trying to nominalize the verb into a nonexistent subject. No one in particular performs *vutlu',* so it makes no sense to talk about the noun that performs *vutlu'.* As I said, I'd like to hear what MO has to say on the subject. It's bound to be more nuanced, not to mention a lot less bombastic and opinionated. Perhaps his explanation would also shed light on Klingon concepts of grammar and why a verb plus {-lu'} takes the prefixes it does. taH ghaH: Why are we dropping the h in *gh*? 'Iv maHqoqvam? 'ej Hoch ghItlhHa'ghach DabuSmeH poH Daghaj'a'? ~mIp'av