On Tue, 21 Mar 2000, David Yeung wrote: > Is there some rule that says /Xn/ + /-ngan/ > becomes /Xngan/? > > (I do seem to recall that there was such a > rule... but I can't say where I read it. The > existence of /vulqangan/ seems to confirm > this.) As does <thlIngan> from <tlhIng>+<ngan> quljIb