>...a quick look at the on-line thesaurus (under "inarticulate") yields some better suggestions, such as, tongue-tied, faltering, mumbling, maundering.

Nothing starting with W?

I've been working on my scene with the women who keep their men in line... sheer brilliance has bubbled to the surface when it comes to G.W. and Laura, if I do say so myself. I've written her as a dominatrix linguistics coach:

L: "Subliminal"
GW: "Subliminable"
L: No, "subliminal"
GW: "Subliminable"
L (cracking whip): "Subliminal"
GW: Ow! "Subliminable"
L: I'm not going to stop until you get it right!