What is "weak consonance (consonancia debil)"?

[Fabian E. Pena Arellano]

	Hello,

	It seems that my last couple of questions have not been of
interest for the people of the list.
	Anyway, I have another question. This is about the coining of
names using verbs. According to Michel Launey, to form a name with the
verbs of "weak consonance (consonancia debil)", the verbs must be writen
on base two to add the suffix -tl(i). What does "weak consonance" mean?
	Thank you,


	Fabian Pena.