1) to turn up the nose or sneer at
2) to mock, deride
Part of Speech: verb
Citing in TDNT: 4:796, 614
From a derivative of the base of G3455 (meaning snout, as that whence lowing proceeds from); to make mouths at, that is, ridicule: - mock.
These two sites give similar information, with the definition from several dictionaries and statistics on the use of the word.
Perseus Digital Library
University of Chicago's Logion lexicon
Thayer's dictionary plus other information.
From this site's dictionary (in Italian)
Click on the first column to search for that word as a form of the root μυκτηρίζω; click on the second column to search for that grammatical form of the root μυκτηρίζω; click on the third column to search for that word and grammatical form; click on the total to search for the root μυκτηρίζω.