Lewis & Short

Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.

mussĭtātor, ōris, m. [mussito],

  1. I. a silent person, a mutterer, Vulg. Isa. 29, 24; cf. mussitator, ὀπογογγυστής, Vet. Gloss.
  2. II. A grumbler: mussitatores discent legem, Vulg. Isa. 29, 24.