mussĭtātor, ōris, m. [mussito],
I a silent person, a mutterer , Vulg. Isa. 29, 24; cf. mussitator, ὀπογογγυστής, Vet. Gloss.—
II A grumbler : mussitatores discent legem, Vulg. Isa. 29, 24.